Prospects for Discovering Supersymmetry at the LHC (2008)
Supersymmetry is one of the best-motivated candidates for physics beyond the Standard Model that might be discovered at the LHC. There are many reasons to expect that it may appear at the TeV scale,...
Supersymmetric Grand Unification and Lepton Universality in $K \to l\nu$ Decays (2008)
Ellis, Jonathan Richard, Lola, Smaragda, Raidal, Martti
Motivated by the prospects for an improved test of lepton universality in K -> l \nu decays by the NA62 experiment at CERN, we study predictions for the possible lepton non-universality in K -> l \nu...
Measurement of CP Violation in Stop Cascade Decays at the LHC (2008)
Ellis, Jonathan Richard, Moortgat, F, Moortgat-Pick, G, Smillie, J M, Tattersall, J
We study the potential observation at the LHC of CP-violating effects in stop production and subsequent cascade decays, g g -> tilde{t}_i tilde{t}_i, tilde{t}_i -> t tilde{chi}^0_j, tilde{chi}^0_j ->...
Buchmüller, O L, Cavanaugh, R, De Roeck, A, Ellis, Jonathan Richard, Flächer, H, Heinemeyer, S, ...
In view of the imminent start of the LHC experimental programme, we use the available indirect experimental and cosmological information to estimate the likely range of parameters of the constrained...
Electric Dipole Moments in the MSSM Reloaded (2008)
Ellis, Jonathan Richard, Lee Jae Sik, Pilaftsis, Apostolos
We present a detailed study of the Thallium, neutron, Mercury and deuteron electric dipole moments (EDMs) in the CP-violating Minimal Supersymmetric extension of the Standard Model (MSSM). We take...
Sivers Asymmetries for Inclusive Pion and Kaon Production in Deep-Inelastic Scattering (2008)
Ellis, Jonathan Richard, Hwang, Dae Sung, Kotzinian, Aram
We calculate the Sivers distribution functions induced by the final-state interaction due to one-gluon exchange in diquark models of nucleon structure, treating the cases of scalar and axial-vector...
Sneutrino NLSP Scenarios in the NUHM with Gravitino Dark Matter (2008)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Yudi
We analyze scenarios in which some flavour of sneutrino is the next-to-lightest supersymmetric particle (NLSP), assuming that the gravitino is the lightest supersymmetric particle (LSP) and provides...
Will the LHC Look into the Fate of the Universe? (2008)
Abel, Steven A, Ellis, Jonathan Richard, Jaeckel, Joerg, Khoze, Valentin V
The LHC will probe the nature of the vacuum that determines the properties of particles and the forces between them. Of particular importance is the fact that our current theories allow the Universe...
Ellis, Jonathan Richard, Giedt, Joel, Lebedev, Oleg, Olive, Keith, Srednicki, Mark
We examine the possible extension of the parameter space of the minimal supersymmetric extension of the Standard Model (MSSM), as expressed via the renormalization-group equations in terms of...
Review of the Safety of LHC Collisions (2008)
Ellis, Jonathan Richard, Giudice, Gian Francesco, Mangano, Michelangelo L, Tkachev, I, Wiedemann, Urs Achim
The safety of collisions at the Large Hadron Collider (LHC) was studied in 2003 by the LHC Safety Study Group, who concluded that they presented no danger. Here we review their 2003 analysis in light...
Varying the Universality of Supersymmetry-Breaking Contributions to MSSM Higgs Boson Masses (2008)
Ellis, Jonathan Richard, Olive, Keith A, Sandick, Pearl
We consider the minimal supersymmetric extension of the Standard Model (MSSM) with varying amounts of non-universality in the soft supersymmetry-breaking contributions to the Higgs scalar masses. In...
Probes of Lorentz Violation in Neutrino Propagation (2008)
Ellis, Jonathan Richard, Harries, Nicholas, Meregaglia, Anselmo, Rubbia, André, Sakharov, Alexander S
It has been suggested that the interactions of energetic particles with the foamy structure of space-time thought to be generated by quantum-gravitational (QG) effects might violate Lorentz...
Derivation of a Vacuum Refractive Index in a Stringy Space-Time Foam Model (2008)
Ellis, Jonathan Richard, Mavromatos, N E, Nanopoulos, D V
It has been suggested that energetic photons propagating in vacuo should experience a non-trivial refractive index due to the foamy structure of space-time induced by quantum-gravitational...
Evidence for the Discrete Asymptotically-Free BFKL Pomeron from HERA Data (2008)
Ellis, Jonathan Richard, Kowalski, H, Ross, D A
We show that the next-to-leading-order renormalization-group-improved asymptotically-free BFKL Pomeron provides a good fit to HERA data on virtual photoproduction at small x and large Q^2. The...
Hadronic Uncertainties in the Elastic Scattering of Supersymmetric Dark Matter (2008)
Ellis, Jonathan Richard, Olive, Keith A, Savage, Christopher
We review the uncertainties in the spin-independent and -dependent elastic scattering cross sections of supersymmetric dark matter particles on protons and neutrons. We propagate the uncertainties in...
Sparticle Discovery Potentials in the CMSSM and GUT-less Supersymmetry-Breaking Scenarios (2008)
Ellis, Jonathan Richard, Olive, Keith A, Sandick, Pearl
We consider the potentials of the LHC and a linear e^+e^- collider (LC) for discovering supersymmetric particles in variants of the MSSM with soft supersymmetry-breaking mass parameters constrained...
Erratum (astro-ph/0510172): Robust Limits on Lorentz Violation from Gamma-Ray Bursts (2007)
Ellis, Jonathan Richard, Mavromatos, N E, Nanopoulos, D V, Sakharov, Alexander S, Sarkisyan-Grinbaum, E
We correct the fitting formula used in refs. [1,2] to obtain a robust limit on a violation of Lorentz invariance that depends linearly on the photon energy. The correction leads to a slight increase...
Lee, J S, Carena, M S, Ellis, Jonathan Richard, Pilaftsis, Apostolos, Wagner, C E M
We describe the Fortran code CPsuperH2.}, which contains several improvements and extensions of its predecessor CPsuperH. It implements improved calculations of the Higgs-boson pole masses, notably a...
The Fine-Tuning Price of Neutralino Dark Matter in Models with Non-Universal Higgs Masses (2007)
Ellis, Jonathan Richard, King, S F, Roberts, J P
We study the amounts of fine-tuning of the parameters of the MSSM with non-universal soft supersymmetry-breaking contributions to the Higgs masses (the NUHM) that would be required for the relic...
WMAP-Compliant Benchmark Surfaces for MSSM Higgs Bosons (2007)
Ellis, Jonathan Richard, Hahn, T, Heinemeyer, S, Olive, K A, Weiglein, G
We explore `benchmark surfaces' suitable for studying the phenomenology of Higgs bosons in the minimal supersymmetric extension of the Standard Model (MSSM), which are chosen so that the...
Albert, J, Aliu, E, Anderhub, H, Antonelli, L A, Antoranz, P, Backes, M, ...
We use the timing of photons observed by the MAGIC gamma-ray telescope during a flare of the active galaxy Markarian 501 to probe a vacuum refractive index ~ 1-(E/M_QGn)^n, n = 1,2, that might be...
B-Meson Observables in the Maximally CP-Violating MSSM with Minimal Flavour Violation (2007)
Ellis, Jonathan Richard, Lee Jae Sik, Pilaftsis, Apostolos
Additional sources of CP violation in the MSSM may affect B-meson mixings and decays, even in scenarios with minimal flavour violation (MFV). We formulate the maximally CP-violating and minimally...
Ellis, Jonathan Richard, Heinemeyer, S, Olive, K A, Weber, A M, Weiglein, G
Indirect information about the possible scale of supersymmetry (SUSY) breaking is provided by B-physics observables (BPO) as well as electroweak precision observables (EWPO). We combine the...
Phenomenology of GUT-less Supersymmetry Breaking (2007)
Ellis, Jonathan Richard, Olive, Keith A, Sandick, Pearl
We study models in which supersymmetry breaking appears at an intermediate scale, M_{in}, below the GUT scale. We assume that the soft supersymmetry-breaking parameters of the MSSM are universal at...
Measurements of Metastable Staus at Linear Colliders (2007)
Cakir, O, Cakir, I T, Ellis, Jonathan Richard, Kirca, Z
We consider scenarios in which the lightest sparticle (LSP) is the gravitino and the next-to-lightest sparticle (NLSP) is a metastable stau. We examine the production of stau pairs in e^{+}e^{-}...
Ellis, Jonathan Richard, Kotzinian, A, Naumov, D, Sapozhnikov, M
We consider models for the spin transfer to Lambda and anti-Lambda hyperons produced in lepton-nucleon deep-inelastic scattering. We make predictions for longitudinal Lambda and anti-Lambda spin...
Reconstructing Sparticle Mass Spectra using Hadronic Decays (2007)
Butterworth, J M, Ellis, Jonathan Richard, Raklev, A R
Most sparticle decay cascades envisaged at the Large Hadron Collider (LHC) involve hadronic decays of intermediate particles. We use state-of-the art techniques based on the \kt jet algorithm to...
Higgs Boson Properties in the Standard Model and its Supersymmetric Extensions (2007)
Ellis, Jonathan Richard, Ridolfi, G, Zwirner, F
We review the realization of the Brout-Englert-Higgs mechanism in the electroweak theory and describe the experimental and theoretical constraints on the mass of the single Higgs boson expected in...
On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios (2007)
Díaz-Cruz, J L, Ellis, Jonathan Richard, Olive, K A, Santoso, Y
We analyze the possibility that the lighter stop {\tilde t_1} could be the next-to-lightest supersymmetric particle (NLSP) in models where the gravitino is the lightest supersymmetric particle (LSP)....
Polarization puts a New Spin on Physics (2007)
Polarization and spin effects are useful for probing the Standard Model, in both the electroweak sector and the strong sector, where the spin decomposition of the nucleon is still a hot topic, with...
CP and Lepton-Number Violation in GUT Neutrino Models with Abelian Flavour Symmetries (2006)
Ellis, Jonathan Richard, Gómez, M E, Lola, S
We study the possible magnitudes of CP and lepton-number-violating quantities in specific GUT models of massive neutrinos with different Abelian flavour groups, taking into account experimental...
The prospects for physics at the LHC are discussed, starting with the foretaste, preparation (and perhaps scoop) provided by the Tevatron, in particular, and then continuing through the successive...
Non-Perturbative Formulation of Non-Critical String Models (2006)
Alexandre, J, Ellis, Jonathan Richard, Mavromatos, Nikolaos E
We apply to non-critical bosonic Liouville string models, characterized by a central-charge deficit Q, a new non-perturbative renormalization-group technique based on a functional method for...
Non-Perturbative Formulation of Time-Dependent String Solutions (2006)
Alexandre, J, Ellis, Jonathan Richard, Mavromatos, Nikolaos E
We formulate here a new world-sheet renormalization-group technique for the bosonic string, which is non-perturbative in the Regge slope alpha' and based on a functional method for controlling the...
Updated Constraints on Axions from SN1987A (2006)
Mayle, R, Wilson, J R, Ellis, Jonathan Richard, Olive, Keith A, Schramm, D N, Steigman, G
Constraints on Axions from SN 1987A (2006)
Mayle, R, Wilson, J R, Ellis, Jonathan Richard, Olive, Keith A, Schramm, D N, Steigman, G
Physics opportunities with future proton accelerators at CERN (2006)
Blondel, A, Camilleri, L L, Ceccucci, A, Ellis, Jonathan Richard, Lindroos, Mats, Mangano, Michelangelo L, ...
We analyze the physics opportunities that would be made possible by upgrades of CERN's proton accelerator complex. These include the new physics possible with luminosity or energy upgrades of the...
Bound-State Effects on Light-Element Abundances in Gravitino Dark Matter Scenarios (2006)
Cyburt, R H, Ellis, Jonathan Richard, Fields, B D, Olive, Keith A, Spanos, V C
If the gravitino is the lightest supersymmetric particle and the long-lived next-to-lightest sparticle (NSP) is the stau, the charged partner of the tau lepton, it may be metastable and form bound...
CPT and Quantum Mechanics Tests with Kaons (2006)
Bernabeu, José, Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Papavassiliou, J
In this review we first discuss the theoretical motivations for possible CPT violation and deviations from ordinary quantum-mechanical behavior of field-theoretic systems in the context of an...
Gravitino Dark Matter Scenarios with Massive Metastable Charged Sparticles at the LHC (2006)
Ellis, Jonathan Richard, Raklev, A R
We investigate the measurement of supersymmetric particle masses at the LHC in gravitino dark matter (GDM) scenarios where the next-to-lightest supersymmetric partner (NLSP) is the lighter scalar...
What if supersymmetry breaking appears below the GUT scale? (2006)
Ellis, Jonathan Richard, Olive, Keith A, Sandick, P
We consider the possibility that the soft supersymmetry-breaking parameters m_{1/2} and m_0 of the MSSM are universal at some scale M_{in} below the supersymmetric grand unification scale M_{GUT}, as...
The Price of WMAP Inflation in Supergravity (2006)
Ellis, Jonathan Richard, Lalak, Z, Pokorski, Stefan, Turzynski, K
The three-year data from WMAP are in stunning agreement with the simplest possible quadratic potential for chaotic inflation, as well as with new or symmetry-breaking inflation. We investigate the...
Higgs Phenomenology with CPsuperH (2006)
Ellis, Jonathan Richard, Lee Jae Sik, Pilaftsis, Apostolos
The MSSM contains CP-violating phases that may have important observable effects in Higgs physics. We review recent highlights in Higgs phenomenology obtained with the code CPsuperH, a useful tool...
Indications of the CMSSM Mass Scale from Precision Electroweak Data (2006)
Ellis, Jonathan Richard, Heinemeyer, S, Olive, Keith A, Weiglein, Georg
We discuss the sensitivities of present-day electroweak precision data to the possible scale of supersymmetry within the constrained minimal supersymmetric extension of the Standard Model (CMSSM)....
Confronting Dark Energy Models with Astrophysical Data (2006)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Mitsou, V A, Nanopoulos, Dimitri V
We discuss fits of cosmological dark energy models to the available data on high-redshift supernovae and baryon oscillations. We consider a conventional model with Cold Dark Matter and a cosmological...
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y, Spanos, V C
We show that present experimental constraints on B_s -> mu+ mu- decay and the CDMS upper limit on the cold dark matter elastic scattering cross section already have significant impact on the...
Phenomenological Indications of the Scale of Supersymmetry (2006)
Ellis, Jonathan Richard, Heinemeyer, S, Olive, Keith A, Weiglein, Georg
Electroweak precision measurements can provide indirect information about the possible scale of supersymmetry already at the present level of accuracy. We update the present-day sensitivities of...
Ultrahigh-energy cosmic rays particle spectra from crypton decays (2005)
Ellis, Jonathan Richard, Mayes, V E, Nanopoulos, Dimitri V
We calculate the spectra of ultra-high-energy cosmic rays (UHECRs) in an explicit top-down model based on the decays of metastable neutral "crypton" states in a flipped SU(5) string model. For each...
Some personal comments are given on some of the exciting interfaces between the physics of HERA and the LHC. These include the quantitative understanding of perturbative QCD, the possible emergence...
Supersymmetry Parameter Analysis : SPA Convention and Project (2005)
Aguilar-Saavedra, J A, Ali, A, Allanach, Benjamin C, Arnowitt, R, Baer, H A, Bagger, J A, ...
High-precision analyses of supersymmetry parameters aim at reconstructing the fundamental supersymmetric theory and its breaking mechanism. A well defined theoretical framework is needed when...
Robust Limits on Lorentz Violation from Gamma-Ray Bursts (2005)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Sakharov, Alexander S, Sarkisyan-Grinbaum, E
We constrain the possibility of a non-trivial refractive index in free space corresponding to an energy-dependent velocity of light: c(E) \simeq c_0 (1 - E/M), where M is a mass scale that might...
On the Higgs Mass in the CMSSM (2005)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A, Santoso, Y
We estimate the mass of the lightest neutral Higgs boson h in the minimal supersymmetric extension of the Standard Model with universal soft supersymmetry-breaking masses (CMSSM), subject to the...
Beyond the Standard Model (2005)
Some possible directions for physics beyond the Standard Model are reviewed, with particular emphasis on topics relevant to astrophysics and cosmology, including supersymmetry at the TeV scale and...
Supersymmetric Benchmarks with Non-Universal Scalar Masses or Gravitino Dark Matter (2005)
De Roeck, A, Ellis, Jonathan Richard, Gianotti, Fabiola, Moortgat, Filip, Olive, Keith A, Pape, Luc
We propose and examine a new set of benchmark supersymmetric scenarios, some of which have non-universal Higgs scalar masses (NUHM) and others have gravitino dark matter (GDM). The scalar masses in...
Liouville Cosmology at Zero and Finite Temperatures (2005)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Westmuckett, M
We discuss cosmology in the context of Liouville strings, characterized by a central-charge deficit Q^2, in which target time is identified with (the world-sheet zero mode of the) Liouville field:...
Grand unification and cosmology (2005)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V
The authors show that there are many issues in which cosmology and grand unification do have things to say to each other, though the utility of some of the connections is not yet clear. (57 refs).
Attempts at superunification (2005)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Maiani, Luciano, Zumino, B
Arguments based on the form of the Higgs potential as determined from the conjectured underlying symmetry, and on the requirement of an anomaly free but non vector-like fermion sector, both point to...
Brower, R C, Ellis, Jonathan Richard, Schmidt, M G, Weis, J H
For pt.I see ibid., vol.B128, p.131 (1977). Hadron scattering is studied in higher orders of the 1/N/sub c/ expansion for quantum chromodynamics in two dimensions. In order 1/N/sub c//sup 2/,...
Hadron scattering in two-dimensional QCD I Formalism and leading order calculations (2005)
Brower, R C, Ellis, Jonathan Richard, Schmidt, M G, Weis, J H
Two-dimensional quantum chromodynamics in the 1/N/sub c/ expansion is explored as a model for hadronic interactions. In meson-meson scattering, order 1/N/sub c/ terms exhibit embryonic 'Regge'...
The phenomenology of the next left-handed quarks (2005)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V, Rudaz, S
The observation of gamma (9.5) suggests that the -onium of at least one new quark has been discovered. The production and decays of the lowest-lying vector states is discussed. Recent observations...
The price of natural flavour conservation in neutral weak interactions (2005)
Chanowitz, M S, Ellis, Jonathan Richard, Gaillard, Mary Katherin
The natural conservation of flavours in neutral weak interactions severely constrains choices of gauge groups and their fermion representations. In the absence of exactly conserved quantum numbers...
Sensitivities to the SUSY Scale from Electroweak Precision Observables (2005)
Ellis, Jonathan Richard, Heinemeyer, S, Olive, Keith A, Weiglein, Georg
Precision measurements, now and at a future linear electron-positron collider (ILC), can provide indirect information about the possible scale of supersymmetry. Performing a chi^2 analysis, we...
A phenomenological profile of the Higgs boson (2005)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V
A discussion is given of the production, decay and observability of the scalar Higgs boson H expected in gauge theories of the weak and electromagnetic interactions such as the Weinberg-Salam model....
Mass corrections to scaling in deep inelastic processes (2005)
Barbieri, Riccardo, Ellis, Jonathan Richard, Gaillard, Mary Katherin, Ross, Graham G
Subasymptotic hadron target and quark-parton mass corrections to scaling in deep inelastic scattering, are studied ignoring interactions. The results are summarized using a modified scaling variable...
Problems with spontaneous breakdown in Reggeon field theories (2005)
Ellis, Jonathan Richard, Savit, R
It is proved that if a Reggeon field theory undergoes spontaneous breakdown as a result of the Pomeron intercept being above one, then the shifted Lagrangian must, in general, develop terms which are...
Resonant CP Violation in Higgsstrahlung at an $e^{+}e^{-}$ Linear Collider (2005)
Ellis, Jonathan Richard, Lee Jae Sik, Pilaftsis, Apostolos
We study resonant CP violation in the Higgsstrahlung process e^+e^- -> H_{1,2,3} (Z -> e^+e^-, \mu^+\mu^-) and subsequent decays H_{1,2,3} -> b \bar{b}, \tau^-\tau^+, in the MSSM with Higgs-sector CP...
Polarized positrons and electrons at the linear collider (2005)
Moortgat-Pick, G, Abe, T, Alexander, G, Ananthanarayan, B, Babich, A A, Barber, D, ...
The proposed International Linear Collider (ILC) is well-suited for discovering physics beyond the Standard Model and for precisely unraveling the structure of the underlying physics. The physics...
Welzel, J, Gherson, D, Ellis, Jonathan Richard
The first chapter treats the Standard Model of particle physics and electroweak symmetry breaking. Low-energy supersymmetry and its phenomenology at future colliders are discussed in the second...
Running of Low-Energy Neutrino Masses, Mixing Angles and CP Violation (2005)
Ellis, Jonathan Richard, Hektor, A, Kadastik, M, Kannike, K, Raidal, M
We calculate the running of low-energy neutrino parameters from the bottom up, parameterizing the unknown seesaw parameters in terms of the dominance matrix $R$. We find significant running only if...
Sneutrino Leptogenesis at the Electroweak Scale (2005)
Ellis, Jonathan Richard, Kang, S K
We propose an alternative mechanism for leptogenesis at the electroweak scale, through the decays of a left-handed sneutrino. This scenario may be realized in supersymmetric models with non-zero...
From Little Bangs to the Big Bang (2005)
The `Little Bangs' made in particle collider experiments reproduce the conditions in the Big Bang when the age of the Universe was a fraction of a second. It is thought that matter was generated, the...
On the Interpretation of $B_{s} \to \mu^{+} mu^{-}$ in the CMSSM (2005)
Ellis, Jonathan Richard, Olive, Keith A, Spanos, V C
We discuss the interpretation of present and possible future experimental constraints on B_s to mu^+ mu^- decay in the context of the constrained minimal extension of the Standard Model (CMSSM) with...
The String Coupling Accelerates the Expansion of the Universe (2005)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Generic cosmological models in non-critical string theory have a time-dependent dilaton background at a late epoch. The cosmological deceleration parameter Q_0 is given by the square of the string...
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Liouville string theory is a natural framework for discussing the non-equilibrium evolution of the Universe. It enables non-critical strings to be treated in mathematically consistent manner, in...
Effects of Unstable Particles on Light-Element Abundances: Lithium versus Deuterium and He3 (2005)
Ellis, Jonathan Richard, Olive, Keith A, Vangioni, E
We reconsider the effects of unstable particles on the production and destruction of the primordial light elements, with a view to reconciling the high primordial Li7 abundance deduced from Big Bang...
Diffraction as a CP and Lineshape Analyzer for MSSM Higgs Bosons at the LHC (2005)
Ellis, Jonathan Richard, Lee Jae Sik, Pilaftsis, Apostolos
We study the production and decay of a coupled system of mixed neutral MSSM Higgs bosons in exclusive double-diffractive processes at the LHC, including non-vanishing CP phases in the soft...
Exotic Baryons in Two-Dimensional QCD (2005)
Ellis, Jonathan Richard, Frishman, Y
Two-dimensional QCD has often been used as a laboratory for studying the full four-dimensional theory, providing, for example, an explicit realization of baryons as solitons. We review aspects of...
Update on the Direct Detection of Supersymmetric Dark Matter (2005)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y, Spanos, V C
We compare updated predictions for the elastic scattering of supersymmetric neutralino dark matter with the improved experimental upper limit recently published by CDMS II. We take into account the...
Potentials between D-Branes in a Supersymmetric Model of Space-Time Foam (2005)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Westmuckett, M
We study a supersymmetric model of space-time foam with two stacks each of eight D8-branes with equal string tensions, separated by a single bulk dimension containing D0-brane particles that...
Direct Estimate of the Gluon Polarization in the Nucleon (2005)
Ellis, Jonathan Richard, Karliner, M
We make a first crude direct estimate of the net gluon polarization in the proton, DeltaG, combining data on the asymmetries in high-p_T hadron production from the HERMES, SMC and COMPASS...
Cosmic Acceleration and the String Coupling (2004)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
In the context of a cosmological string model describing the propagation of strings in a time-dependent Robertson-Walker background space-time, we show that the asymptotic acceleration of the...
Resonant CP Violation in MSSM Higgs Production and Decay at $\gamma \gamma$ Colliders (2004)
Ellis, Jonathan Richard, Lee Jae Sik, Pilaftsis, Apostolos
We study CP-violating phenomena in the production, mixing and decay of a coupled system of CP-violating neutral Higgs bosons at \gamma \gamma colliders, assuming a Minimal Supersymmetric Standard...
Today's View on Strangeness (2004)
There are several different experimental indications, such as the pion-nucleon sigma term and polarized deep-inelastic scattering, which suggest that the nucleon wave function contains a hidden s bar...
Indirect Sensitivities to the Scale of Supersymmetry (2004)
Ellis, Jonathan Richard, Heinemeyer, S, Olive, Keith A, Weiglein, Georg
Precision measurements, now and at a future linear electron-positron collider (ILC), can provide indirect information about the possible scale of supersymmetry. We illustrate the present-day and...
Beyond the Standard Model of Cosmology (2004)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V
Recent cosmological observations of unprecented accuracy, by WMAP in particular, have established a `Standard Model' of cosmology, just as LEP established the Standard Model of particle physics. Both...
Deep-Ocean Crusts as Telescopes: Using Live Radioisotopes to Probe Supernova Nucleosynthesis (2004)
Fields, B D, Hochmuth, K A, Ellis, Jonathan Richard
Live 60Fe has recently been detected in a deep-ocean ferromanganese crust, isolated in layers dating from about 3 Myr ago. Since 60Fe has a mean life of 2.2 Myr, a near-Earth supernova is the only...
Aspects of ICHEP 2004 are summarized from a theoretical point of view. QCD works, new NNLO calculations are becoming available and new string calculational tools are emerging, but no conclusions can...
Theoretical Introduction to Physics with Linear Colliders (2004)
The major open questions in particle physics are summarized, as are the abilities of linear colliders of different energies to add to the knowledge obtainable from the LHC in various scenarios for...
Prospects for Sparticle Discovery in Variants of the MSSM (2004)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y, Spanos, V C
We discuss the prospects for detecting supersymmetric particles in variants of the minimal supersymmetric extension of the Standard Model (MSSM), in light of laboratory and cosmological constraints....
The Classification of the Simply Laced Berger Graphs from Calabi-Yau $CY_3$ spaces (2004)
Ellis, Jonathan Richard, Torrente-Lujan, E, Volkov, G G
The algebraic approach to the construction of the reflexive polyhedra that yield Calabi-Yau spaces in three or more complex dimensions with K3 fibres reveals graphs that include and generalize the...
Brany Liouville Inflation (2004)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Sakharov, A
We present a specific model for cosmological inflation driven by the Liouville field in a non-critical supersymmetric string framework, in which the departure from criticality is due to open strings...
Very Constrained Minimal Supersymmetric Standard Models (2004)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Yudi, Spanos, Vassilis C
We consider very constrained versions of the minimal supersymmetric extension of the Standard Model (VCMSSMs) which, in addition to constraining the scalar masses m_0 and gaugino masses m_{1/2} to be...
A supersymmetric D-brane Model of Space-Time Foam (2004)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Westmuckett, Michael
We present a supersymmetric model of space-time foam with two stacks of eight D8-branes with equal string tensions, separated by a single bulk dimension containing D0-brane particles that represent...
LHC Signatures of Resonant CP Violation in a Minimal Supersymmetric Higgs Sector (2004)
Ellis, Jonathan Richard, Pilaftsis, Apostolos, Sik Lee Jae
We present the general formalism for studying CP-violating phenomena in the production, mixing and decay of a coupled system of CP-violating neutral Higgs bosons at high-energy colliders. Considering...
The seesaw model of neutrinos might explain the size, age, flatness and near-homogeneity of the Universe via sneutrino inflation, as well as explaining the origin of matter via leptogenesis. The...
Patterns of Lepton-Flavour Violation Motivated by Decoupling and Sneutrino Inflation (2004)
Chankowski, Piotr H, Ellis, Jonathan Richard, Pokorski, Stefan, Raidal, Martti, Turzynski, Krzysztof
We present predictions for flavour-violating charged-lepton decays induced by the seesaw mechanism implemented within the constrained minimal supersymmetric standard model (CMSSM) with universal...
Flipped Cryptons and the UHECRs (2004)
Ellis, Jonathan Richard, Mayes, V E, Nanopoulos, Dimitri V
Cryptons are metastable bound states of fractionally-charged particles that arise generically in the hidden sectors of models derived from heterotic string. We study their properties and decay modes...
Chiral-Soliton Predictions for Exotic Baryons (2004)
Ellis, Jonathan Richard, Karliner, M, Praszalowicz, M
We re-analyze the predictions of chiral-soliton models for the masses and decay widths of baryons in the exotic antidecuplet of flavour SU(3). The calculated ranges of the chiral-soliton moment of...
Reggeon field theory on a lattice - a formulation (2004)
Brower, R C, Ellis, Jonathan Richard, Savit, R, Zakrzewski, W J
On the weak decays of high mass hadrons (2004)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V
Lattice formulations of Reggeon interactions (2004)
Brower, R C, Ellis, Jonathan Richard, Savit, R, Zinn-Justin, Jean
Search for gluons in $\^{+}$e$+{-} annihilation (2004)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Ross, Graham G
Gravitino Dark Matter in the CMSSM (2003)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y, Spanos, V C
We consider the possibility that the gravitino might be the lightest supersymmetric particle (LSP) in the constrained minimal extension of the Standard Model (CMSSM). In this case, the...
Space-Time Foam may Violate the Principle of Equivalence (2003)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Sakharov, Alexander S
The interactions of different particle species with the foamy space-time fluctuations expected in quantum gravity theories may not be universal, in which case different types of energetic particles...
Connections Between Big and Small (2003)
Big-Bang cosmology and ideas for possible physics beyond the Standard Model of particle physics are introduced. The density budget of the Universe is audited, and the issues involved in calculating...
Likelihood Analysis of the CMSSM Parameter Space (2003)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y, Spanos, V C
We present a likelihood analysis of the parameter space of the constrained minimal supersymmetric extension of the Standard Model (CMSSM), in which the input scalar masses m_0 and fermion masses...
A National Research Council study on connecting quarks with the cosmos has recently posed a number of the more important open questions at the interface between particle physics and cosmology. These...
Synchrotron Radiation and Quantum Gravity (2003)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Sakharov, A
Photons may evade a synchrotron radiation constraint on quantum gravity by violating the equivalence principle.
Synchrotron Radiation from the Crab Nebula Discriminates between Models of Space-Time Foam (2003)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Sakharov, A
It has been argued by Jacobson, Liberati and Mattingly that synchrotron radiation from the Crab Nebula imposes a stringent constraint on any modification of the dispersion relations of the electron...
High-Energy Constraints on the Direct Detection of MSSM Neutralinos (2003)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y, Spanos, V C
The requirement that the MSSM remain an acceptable effective field theory up to energies beyond the weak scale constrains the sparticle spectrum, and hence the permissible ranges of cold dark matter...
Lee Jae Sik, Pilaftsis, Apostolos, Carena, M S, Choi, S Y, Drees, Manuel, Ellis, Jonathan Richard, ...
We provide a detailed description of the Fortran code CPsuperH, a newly--developed computational package that calculates the mass spectrum and decay widths of the neutral and charged Higgs bosons in...
Updated Post-WMAP Benchmarks for Supersymmetry (2003)
Battaglia, Marco, Ellis, Jonathan Richard, Gianotti, F, Olive, Keith A, Pape, L, De Roeck, A
We update a previously-proposed set of supersymmetric benchmark scenarios, taking into account the precise constraints on the cold dark matter density obtained by combining WMAP and other...
Meson-Baryon Scattering in QCD$_2$ for any Coupling (2003)
Ellis, Jonathan Richard, Frishman, Y, Karliner, M
Extending earlier work on strong-coupling meson-baryon scattering in QCD_2, we derive the effective meson-baryon action for any value of the coupling constant, in the large-N_c limit. Colour degrees...
Phenomenological Constraints on Patterns of Supersymmetry Breaking (2003)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y, Spanos, V C
Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A_0 and B_0 at the input scale. In such models, the value of tan...
Particle Physics and Cosmology (2003)
In the first Lecture, the Big Bang and the Standard Model of particle physics are introduced, as well as the structure of the latter and open issues beyond it. Neutrino physics is discussed in the...
Dark Matter and Dark Energy: Summary and Future Directions (2003)
This paper reviews the progress reported at this Royal Society Discussion Meeting and advertizes some possible future directions in our drive to understand dark matter and dark energy. Additionally,...
Ellis, Jonathan Richard, Raidal, Martti, Yanagida, T
We reconsider the possibility that inflation was driven by a sneutrino - the scalar supersymmetric partner of a heavy singlet neutrino - in the minimal seesaw model of neutrino masses. We show that...
Supersymmetric Dark Matter in Light of WMAP (2003)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y, Spanos, V C
We re-examine the parameter space of the constrained minimal supersymmetric extension of the Standard Model (CMSSM), taking account of the restricted range of \Omega_{CDM} h^2 consistent with the...
Direct Detection of Dark Matter in the MSSM with Non-Universal Higgs Masses (2003)
Ellis, Jonathan Richard, Ferstl, A, Olive, Keith A, Santoso, Y
We calculate dark matter scattering rates in the minimal supersymmetric extension of the Standard Model (MSSM), allowing the soft supersymmetry-breaking masses of the Higgs multiplets, m_{1,2}, to be...
Universal Calabi-Yau Algebra: Classification and Enumeration of Fibrations (2002)
Anselmo, F, Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Volkov, G
We apply a universal normal Calabi-Yau algebra to the construction and classification of compact complex $n$-dimensional spaces with SU(n) holonomy and their fibrations. This algebraic approach...
Collider Probes of the MSSM Higgs Sector with Explicit CP Violation (2002)
Carena, M S, Ellis, Jonathan Richard, Mrenna, S, Pilaftsis, Apostolos, Wagner, C E M
We investigate the hadron collider phenomenology of the Minimal Supersymmetric Standard Model (MSSM) with explicit CP violation for Higgs bosons that can be observed in Standard Model search...
What Next in Flavour Physics and CP Violation? (2002)
The future of flavour physics and CP violation in the quark, lepton and Higgs sectors are discussed, particularly from the viewpoint of physics beyond the Standard Model, such as supersymmetry....
Precision Analysis of the Lightest MSSM Higgs Boson at Future Colliders (2002)
Ellis, Jonathan Richard, Heinemeyer, S, Olive, Keith A, Weiglein, Georg
We investigate the sensitivity of observables measurable in e^+ e^-, gamma gamma and mu^+ mu^- collisions for distinguishing the properties of the light neutral CP-even Higgs boson in the minimal...
Updated Nucleosynthesis Constraints on Unstable Relic Particles (2002)
Cyburt, R H, Ellis, Jonathan Richard, Fields, B D, Olive, Keith A
We revisit the upper limits on the abundance of unstable massive relic particles provided by the success of Big-Bang Nucleosynthesis calculations. We use the cosmic microwave background data to...
Limits of the Standard Model (2002)
Supersymmetry is one of the most plausible extensions of the Standard Model, since it is well motivated by the hierarchy problem, supported by measurements of the gauge coupling strengths, consistent...
High-Energy Astrophysics and Cosmology (2002)
Interfaces between high-energy physics, astrophysics and cosmology are reviewed, with particular emphasis on the important roles played by high-energy cosmic-ray physics. These include the...
Particle Physics at Future Colliders (2002)
The search for physics beyond the Standard Model motivates new high-energy accelerators, which will require high luminosities in order to produce interesting new heavy particles. Using the Higgs...
Exploration of the MSSM with Non-Universal Higgs Masses (2002)
Ellis, Jonathan Richard, Falk, T, Olive, Keith A, Santoso, Y
We explore the parameter space of the minimal supersymmetric extension of the Standard Model (MSSM), allowing the soft supersymmetry-breaking masses of the Higgs multiplets, m_{1,2}, to be...
Quantum-Gravity Analysis of Gamma-Ray Bursts using Wavelets (2002)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Sakharov, Alexander S
In some models of quantum gravity, space-time is thought to have a foamy structure with non-trivial optical properties. We probe the possibility that photons propagating in vacuum may exhibit a...
Impact of Low-Energy Constraints on Lorentz Violation (2002)
Ellis, Jonathan Richard, Gravanis, E, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We extend previous analyses of the violation of Lorentz invariance induced in a non-critical string model of quantum space-time foam, discussing the propagation of low-energy particles through a...
Dedes, A, Ellis, Jonathan Richard, Raidal, Martti
We study the rates allowed for the Higgs-mediated decays $B_{s,d}^0\to\mu\tau, e\tau$ and $\tau\to \mu\mu\mu, e\mu\mu$ in supersymmetric seesaw models, assuming that the only source of lepton flavour...
Looking Back at the First Decade of 21st-Century High-Energy Physics (2002)
On the occasion of the Tenth Conference on String Phenomenology in 2011, I review the dramatic progress since 2002 in experimental tests of fundamental theoretical ideas. These include the discovery...
Universal Calabi-Yau Algebra: Towards an Unification of Complex Geometry (2002)
Anselmo, F, Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Volkov, G
We present a universal normal algebra suitable for constructing and classifying Calabi-Yau spaces in arbitrary dimensions. This algebraic approach includes natural extensions of reflexive weight...
A String Derivation of the $\nd{S}$ matrix (2002)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We show that, in string theory, as a result of the $W_{\infty}$-symmetries that preserve quantum coherence in the {\it full} string theory by coupling different mass levels, transitions between...
A String Derivation of the $\nd{S}$ matrix (2002)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We show that, in string theory, as a result of the $W_{\infty}$-symmetries that preserve quantum coherence in the {\it full} string theory by coupling different mass levels, transitions between...
Observable consequences of partially degenerate leptogenesis (2002)
Ellis, Jonathan Richard, Raidal, Martti, Yanagida, T
In the context of the seesaw mechanism, it is natural that the large solar and atmospheric neutrino mixing angles originate separately from large 2 by 2 mixings in the neutrino and charged-lepton...
Leptogenesis and the violation of lepton number and CP at low energies (2002)
Ellis, Jonathan Richard, Raidal, Martti
In the context of the minimal supersymmetric seesaw model, we study the implications of the current neutrino data for thermal leptogenesis, $\beta\beta_{0\nu}$ decay, and leptonic flavour- and...
Tau flavour violation in sparticle decays at the LHC (2002)
Carvalho, D F, Ellis, Jonathan Richard, Gómez, M E, Lola, S, Romão, J C
We consider sparticle decays that violate tau lepton number, motivated by neutrino oscillation data. We work in the context of the constrained minimal supersymmetric extension of the Standard Model...
New parametrization of the seesaw mechanism and applications in supersymmetric models (2002)
Ellis, Jonathan Richard, Hisano, J, Raidal, Martti, Shimizu, Y
We present a new parametrization of the minimal seesaw model, expressing the heavy-singlet neutrino Dirac Yukawa couplings (Y/sub nu /)/sub ij/ and Majorana masses M(N/sub i/) in terms of effective...
Intersecting Branes Flip SU(5) (2002)
Ellis, Jonathan Richard, Kanti, Panagiota, Nanopoulos, Dimitri V
Within a toroidal orbifold framework, we exhibit intersecting brane-world constructions of flipped SU(5) \times U(1) GUT models with various numbers of generations, other chiral matter...
Future Perspectives at CERN (2002)
Current and future experiments at CERN are reviewed,with emphasis on those relevant to astrophysics and cosmology. These include experiments related to nuclear astrophysics, matter-antimatter...
The prospects for CHORUS and NOMAD in the light of COBE and GALLEX (2002)
Ellis, Jonathan Richard, López, J M, Nanopoulos, Dimitri V
The most natural MSW neutrino oscillation interpretation of the GALLEX and other solar neutrino data, which invokes $m_{\nu_\mu}\sim3\times10^{-3}\eV$, and a general GUT see-saw hierarchy of neutrino...
Flipping SU(5) out of Trouble (2002)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Walker, J
Minimal supersymmetric SU(5) GUTs are being squeezed by the recent values of alpha_s, sin^2 theta_W, the lower limit on the lifetime for p to nubar K decay, and other experimental data. We show how...
Intrinsic Polarized Strangeness and Lambda Polarization in Deep-Inelastic Production (2002)
Ellis, Jonathan Richard, Kotzinian, A M, Naumov, D V
We propose a model for the longitudinal polarization of Lambda baryons produced in deep-inelastic lepton scattering at any xF, based on static SU(6) quark-diquark wave functions and polarized...
The MSSM Parameter Space with Non-Universal Higgs Masses (2002)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y
Without assuming that Higgs masses have the same values as other scalar masses at the input GUT scale, we combine constraints on the minimal supersymmetric extension of the Standard Model (MSSM)...
Salient aspects of the meeting are summarized, including our knowledge of dark matter at different cosmological and astrophysical distance scales, ranging from large-scale structure to the cores of...
Supersymmetry for Alp Hikers (2002)
These lectures provide a phenomenological introduction to supersymmetry, concentrating on the minimal supersymmetric extension of the Standard Model (MSSM). In the first lecture, motivations are...
Physics opportunities at $\mu^{+}\mu^{-}$ Higgs factories (2002)
Blöchinger, C, Carena, M S, Ellis, Jonathan Richard, Fraas, H, Franke, F, García, D, ...
We update theoretical studies of the physics opportunities presented by mu+mu- Higgs factories. Interesting measurements of the Standard Model Higgs decays into {\bar b}b, tau+tau- and WW* may be...
Constraining Supersymmetry (2002)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y
We review constraints on the minimal supersymmetric extension of the Standard Model (MSSM) coming from direct searches at accelerators such as LEP, indirect measurements such as b -> s gamma decay...
Higgs Physics with a gamma-gamma Collider Based on CLIC 1 (2001)
Asner, D M, Burkhardt, H, De Roeck, A, Ellis, Jonathan Richard, Gronberg, J B, Heinemeyer, S, ...
We present the machine parameters and physics capabilities of the CLIC Higgs Experiment (CLICHE), a low-energy gamma-gamma collider based on CLIC 1, the demonstrator project for the higher-energy...
Calculations of neutralino-stop coannihilation in the CMSSM (2001)
Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y
We present detailed calculations of the neutralino-stop coannihilation channels that have the largest impact on the relic neutralino density in the constrained minimal supersymmetric extension of the...
Physics motivations for future CERN accelerators (2001)
De Roeck, A, Ellis, Jonathan Richard, Gianotti, F
We summarize the physics motivations for future accelerators at CERN. We argue that (a) a luminosity upgrade for the LHC could provide good physics return for a relatively modest capital investment,...
Post-LEP CMSSM Benchmarks for Supersymmetry (2001)
Battaglia, Marco, De Roeck, A, Ellis, Jonathan Richard, Gianotti, F, Matchev, K T, Olive, Keith A, ...
We introduce a set of CMSSM benchmark scenarios that take into account the constraints from LEP, Tevatron, $b \to s \gamma$, $g_\mu - 2$ and cosmology. The benchmark points are chosen to span the...
Lepton electric dipole moments in non-degenerate supersymmetric Seesaw models (2001)
Ellis, Jonathan Richard, Hisano, J, Raidal, Martti, Shimizu, Y
In the context of supersymmetric seesaw models of neutrino masses with non-degenerate heavy neutrinos, we show that Dirac Yukawa interactions N^c_i (Y_nu)_{ij} L_j H_2 induce large threshold...
Supersymmetric dark matter detection at post-LEP Benchmark points (2001)
Ellis, Jonathan Richard, Feng, J L, Ferstl, A, Matchev, K T, Olive, Keith A
We review the prospects for discovering supersymmetric dark matter in a recently proposed set of post-LEP supersymmetric benchmark scenarios. We consider direct detection through spin-independent...
Higgs-Boson Pole Masses in the MSSM with Explicit CP Violation (2001)
Carena, M S, Ellis, Jonathan Richard, Pilaftsis, Apostolos, Wagner, C E M
Extending previous results obtained in the effective-potential approach, we derive analytic expressions for the pole masses of the charged and neutral Higgs bosons in the minimal supersymmetric...
Constraints from Accelerator Experiments on the Elastic Scattering of CMSSM Dark Matter (2001)
Ellis, Jonathan Richard, Ferstl, A, Olive, Keith A
We explore the allowed ranges of cross sections for the elastic scattering of neutralinos \chi on nucleons in the constrained minimal supersymmetric extension of the Standard Model (CMSSM), in which...
Decline and Fall of the Standard Model? (2001)
Motivations for physics beyond the Standard Model are reviewed, with particular emphasis on supersymmetry at the TeV scale. Constraints on the minimal supersymmetric extension of the Standard Model...
Prospects for Detecting Supersymmetric Dark Matter at Post-LEP Benchmark Points (2001)
Ellis, Jonathan Richard, Feng, J L, Ferstl, A, Matchev, K T, Olive, Keith A
A new set of supersymmetric benchmark scenarios has recently been proposed in the context of the constrained MSSM (CMSSM) with universal soft supersymmetry-breaking masses, taking into account the...
Lower Limits on Soft Supersymmetry-Breaking Scalar Masses (2001)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A
Working in the context of the CMSSM, we argue that phenomenological constraints now require the universal soft supersymmetry-breaking scalar mass m_0 be non-zero at the input GUT scale. This...
CP Violation in the Minimal Supersymmetric Seesaw Model (2001)
Ellis, Jonathan Richard, Hisano, J, Lola, S, Raidal, Martti
We study CP violation in the lepton sector of the supersymmetric extension of the Standard Model with three generations of massive singlet neutrinos with Yukawa couplings $Y_\nu$ to lepton doublets,...
Physics with Low-Energy Muons at a Neutrino Factory Complex (2001)
Äystö, J, Baldini, A, Blondel, A, De Gouvêa, A, Ellis, Jonathan Richard, Fetscher, W, ...
The physics potential of an intense source of low-energy muons is studied. Such a source is a necessary stage towards building the neutrino factories and muon colliders which are being considered at...
Options for Gauge Groups in Five-Dimensional Supergravity (2001)
Ellis, Jonathan Richard, Günaydin, M, Zagermann, Marco
Motivated by the possibility that physics may be effectively five-dimensional over some range of distance scales, we study the possible gaugings of five-dimensional N=2 supergravity. Using a...
On Electron-Positron Annihilation into Nucleon-Antinucleon Pairs (2001)
Ellis, Jonathan Richard, Karliner, M M
We discuss the puzzling experimental results on baryon-antibaryon production in e+e- annihilation close to the threshold, in particular the fact that sigma(e+e- --> nbar n) >~ sigma(e+e- --> pbar p)....
Noncritical Liouville string escapes constraints on generic models of quantum gravity (2001)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
It has recently been pointed out that generic models of quantum gravity must contend with severe phenomenological constraints imposed by gravitational Cerenkov radiation, neutrino oscillations and...
Kaon physics with a high-intensity proton driver (2001)
Belyaev, A, Buchalla, Gerhard, Ceccucci, Augusto, Chizhov, M V, D'Ambrosio, G, Dorokhov, A E, ...
We study opportunities for future high-precision experiments in kaon physics using a high-intensity proton driver, which could be part of the front-end of a muon storage ring complex. We discuss in...
Proposed Post-LEP Benchmarks for Supersymmetry (2001)
Battaglia, Marco, De Roeck, A, Ellis, Jonathan Richard, Gianotti, F, Matchev, K T, Olive, Keith A, ...
We propose a new set of supersymmetric benchmark scenarios, taking into account the constraints from LEP, b to s gamma, g_mu - 2 and cosmology. We work in the context of the constrained MSSM (CMSSM)...
Theoretical Aspects of Dark Matter Detection (2001)
Ellis, Jonathan Richard, Ferstl, A, Olive, Keith A
Direct and indirect dark matter detection relies on the scattering of the dark matter candidate on nucleons or nuclei. Here, attention is focused on dark matter candidates (neutralinos) predicted in...
A Neutrino Factory Manifesto (2001)
A neutrino factory is capable of answering basic questions in the physics of neutrino oscillations, which address fundamental issues in Grand Unified Theories and flavour physics. In addition, the...
String Theory and an Accelerating Universe (2001)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
An accelerating Universe can be accommodated naturally within non-critical string theory, in which scattering is described by a superscattering matrix \$ that does not factorize as a product of $S$-...
Physics at the front-end of a neutrino factory: a quantitative appraisal (2001)
Mangano, Michelangelo L, Alekhin, S I, Anselmino, M, Ball, R D, Boglione, M, D'Alesio, U, ...
We present a quantitative appraisal of the physics potential for neutrino experiments at the front-end of a muon storage ring. We estimate the forseeable accuracy in the determination of several...
Observability of the Lightest CMSSM Higgs Boson at Hadron Colliders (2001)
Ellis, Jonathan Richard, Heinemeyer, S, Olive, Keith A, Weiglein, Georg
We discuss the observability of the lightest neutral Higgs boson in the constrained MSSM (CMSSM), with universal soft supersymmetry-breaking parameters, at hadron colliders such as the Tevatron and...
How Finely Tuned is Supersymmetric Dark Matter? (2001)
Ellis, Jonathan Richard, Olive, Keith A
We introduce a quantification of the question in the title: the logarithmic sensitivity of the relic neutralino density Omega-hsquared to variations in input parameters such as the supersymmetric...
Astroparticle Aspects of Supersymmetry (2001)
After recalling the motivations for expecting supersymmetry to appear at energies below 1 TeV, the reasons why the lightest supersymmetric particle is an ideal candidate for cold dark matter are...
Charged-Lepton-Flavour Violation in the CMSSM in View of the Muon Anomalous Magnetic Moment (2001)
Carvalho, D F, Ellis, Jonathan Richard, Gómez, M E, Lola, S
We use the BNL E821 measurement of g - 2, the anomalous magnetic moment of the muon, to normalize, within a supersymmetric GUT framework, constrained MSSM (CMSSM) predictions for processes that...
Gluon Contributions to Parity-Violating Asymmetries in Polarized Proton-Proton Scattering (2001)
Ellis, Jonathan Richard, Moretti, S, Ross, D
We report on a calculation of one-loop weak corrections to polarized quark-gluon scattering and the corresponding crossed channels. Such contributions are suppressed formally by one power of alpha_s...
Combining the Muon Anomalous Magnetic Moment with other Constraints on the CMSSM (2001)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A
We combine the constraint suggested by the recent BNL E821 measurement of the anomalous magnetic moment of the muon on the parameter space of the constrained MSSM (CMSSM) with those provided...
The CMSSM Parameter Space at Large tan beta (2001)
Ellis, Jonathan Richard, Falk, T, Ganis, G, Olive, Keith A, Srednicki, M A
We extend previous combinations of LEP and cosmological relic density constraints on the parameter space of the constrained MSSM, with universal input supersymmetry-breaking parameters, to large tan...
Space-time foam effects on particle interactions and the Greisen-Zatsepin-Kuzmin cutoff (2000)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Modelling space-time foam using a non-critical Liouville-string model for the quantum fluctuations of D branes with recoil, we discuss the issues of momentum and energy conservation in particle...
The 115 GeV Higgs Odyssey (2000)
On his way home from Troy, Odysseus had arrived within reach of Ithaca when a great storm blew up. He was swept away, and only several years later was he able to return to reclaim his rights from the...
New physics with the compact linear collider (2000)
Ellis, Jonathan Richard, Wilson, Ian H
Probing beyond the established picture of particle physics will require some radical rethinking of accelerator designs. If accelerators are to reach the ever-higher energies that theorists would...
A light Higgs Boson would invite Supersymmmetry (2000)
Ellis, Jonathan Richard, Ross, D
If the Higgs boson weighs about 115 GeV, the effective potential of the Standard Model becomes unstable above a scale of about 10^6 GeV. This instability may be rectified only by new bosonic...
Various developing topics in CP violation are reviewed. There are many theoretical reasons to hope that the CKM paradigm may be incomplete. It is surely too soon to be claiming new physics in...
Testing Fundamental Physics with High-Energy Cosmic Rays (2000)
Cosmic rays may provide opportunities for probing fundamental physics. For example, ultra-high-energy cosmic rays might originate from the decays of metastable heavy particles, and astrophysical...
What if the Higgs Boson Weighs 115 GeV? (2000)
Ellis, Jonathan Richard, Ganis, G, Nanopoulos, Dimitri V, Olive, Keith A
If the Higgs boson indeed weighs about 114 to 115 GeV, there must be new physics beyond the Standard Model at some scale \la 10^6 GeV. The most plausible new physics is supersymmetry, which predicts...
Flat Directions in Flipped SU(5); 1, All-Order Analysis (2000)
Cleaver, G B, Ellis, Jonathan Richard, Nanopoulos, Dimitri V
We present a systematic classification of field directions for the string-derived flipped SU(5) model that are D- and F-flat to all orders. Properties of the flipped SU(5) model with field values in...
CP-Violating MSSM Higgs Bosons in the Light of LEP 2 (2000)
Carena, M S, Ellis, Jonathan Richard, Pilaftsis, Apostolos, Wagner, C E M
In the MSSM, the CP parities of the neutral Higgs bosons may be mixed by radiative effects induced by explicit CP violation in the third generation of squarks. To allow for this possibility, we argue...
Summary of Neutrino 2000 (2000)
Aspects of neutrino physics beyond the Standard Model are emphasized, including the emerging default options for atmospheric and solar neutrino oscillations, namely nu_mu to nu_tau and nu_e to...
Charged-Lepton-Flavour Violation in Kaon Decays in Supersymmetric Theories (2000)
Belyaev, A S, Dorokhov, A E, Chizhov, M V, Ellis, Jonathan Richard, Gómez, M E, Lola, S
We discuss rare kaon decays that violate charged-lepton flavour conservation in supersymmetric theories with and without R parity, in view of possible experiments using an intense proton source as...
How Large are Dissipative Effects in Non-Critical Liouville String Theory? (2000)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
In the context of non-critical Liouville strings, we clarify why we expect non-quantum-mechanical dissipative effects to be of order E^2/M_P, where E is a typical energy scale of the probe, and M_P...
Perspectives in High-Energy Physics (2000)
A personal view of current prospectives in particle physics is presented, inspired by the contributions to this meeting. Particular emphasis is laid in precision tests of the Standard Model and the...
Results from an Algebraic Classification of Calabi-Yau Manifolds (2000)
Anselmo, F, Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Volkov, G
We present results from an inductive algebraic approach to the systematic construction and classification of the `lowest-level' CY3 spaces defined as zeroes of polynomial loci associated with...
Exploration of Elastic Scattering Rates for Supersymmetric Dark Matter (2000)
Ellis, Jonathan Richard, Ferstl, A, Olive, Keith A
We explore the possible cross sections for the elastic scattering of neutralinos chi on nucleons p,n in the minimal supersymmetric extension of the standard model (MSSM). Universality of the soft...
Dynamical Formation of Horizons in Recoiling D Branes (2000)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
A toy calculation of string/D-particle interactions within a world-sheet approach indicates that quantum recoil effects - reflecting the gravitational back-reaction on space-time foam due to the...
Strangeness and Hadron Structure (2000)
The nucleon wave function may contain a significant component of ssbar pairs, according to several measurements including the pi-nucleon sigma term, charm production and polarization effects in...
Is Nothing Sacred? Vacuum Energy, Supersymmetry and Lorentz Breaking from Recoiling D branes (2000)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Classical superstring vacua have zero vacuum energy and are supersymmetric and Lorentz-invariant. We argue that all these properties may be destroyed when quantum aspects of the interactions between...
High-energy Scattering In A Two-dimensional Gauge Theory (2000)
Brower, R C, Ellis, Jonathan Richard, Schmidt, M G, Weis, J H
A quest for a wholly scaling variable (2000)
Barbieri, Riccardo, Ellis, Jonathan Richard, Gaillard, Mary Katherin, Ross, Graham G
Supersymmetric Dark Matter in the Light of LEP and the Tevatron Collider (2000)
Ellis, Jonathan Richard, Falk, T, Ganis, G, Olive, Keith A
We analyze the accelerator constraints on the parameter space of the Minimal Supersymmetric extension of the Standard Model, comparing those now available from LEP II and anticipating the likely...
Aspects of M theory and phenomenology (2000)
A brief review is presented of selected topics, including a world- sheet formulation of M theory, couplings and scales in M phenomenology, the perils of baryon decay and the possible elevation of...
Carena, M S, Ellis, Jonathan Richard, Pilaftsis, Apostolos, Wagner, C E M
We perform a systematic study of the one-loop renormalization-group-improved effective potential of the minimal supersymmetric extension of the Standard Model (MSSM), including CP violation induced...
Implications of Anomalous U(1) Symmetry in Unified Models: the Flipped SU(5) x U(1) Paradigm (2000)
Ellis, Jonathan Richard, Leontaris, George K, Rizos, J
A generic feature of string-derived models is the appearance of an anomalousAbelian U(1)_A symmetry which, among other properties, constrains the Yukawacouplings and distinguishes the three families...
Three-body Supersymmetric Top Decays (2000)
Belyaev, A, Ellis, Jonathan Richard, Lola, S
We discuss three-body supersymmetric top decays, in schemes both with andwithout R-parity conservation, assuming that sfermion masses are larger thanm_t. We find that MSSM top decays into...
Towards an Algebraic Classification of Calabi-Yau Manifolds; 1, Study of K3 Spaces (2000)
Anselmo, F, Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Volkov, G
We present an inductive algebraic approach to the systematic construction andclassification of generalized Calabi-Yau (CY) manifolds in different numbers ofcomplex dimensions, based on Batyrev's...
Physics Goals of the Next Century at CERN (2000)
After recalling briefly the main physics issues beyond the Standard Model,the main physics objectives of experiments at CERN in the coming decade(s) arereviewed. These include the conclusion of the...
Introduction to circular and linear colliders (2000)
Ellis, Jonathan Richard, Gareyte, Jacques, Delahaye, Jean-Pierre
Myatt, Gerald, Ellis, Jonathan Richard, Kalmus, George Ernest, Llewellyn Smith, Christopher Hubert, Matthiae, Giorgio, Richter, Burton, ...
Ugo Amaldi,a man of science - pp total cross section - Neutrino physics - DELPHI & LEP physics Supersymmetry Electron-proton physics - Linear colliders - Closing address - -
Reheating and Supersymmetric Flat-Direction Baryogenesis (2000)
Allahverdi, R, Campbell, Bruce A, Ellis, Jonathan Richard
We re-examine Affleck-Dine baryo/leptogenesis from the oscillation of condensates along flat directions of the supersymmetric standard model, which attained large vevs at the end of inflationary...
Re-Evaluation of the Elastic Scattering of Supersymmetric Dark Matter (2000)
Ellis, Jonathan Richard, Ferstl, A, Olive, Keith A
We examine the cross sections for the elastic scattering of neutralinos supersymmetric standard model. We find narrow bands of possible values of the cross section, that are considerably lower than...
Supersymmetric Dark Matter and the Energy of a Linear Electron-Positron Collider (1999)
Ellis, Jonathan Richard, Ganis, G, Olive, Keith A
We suggest that supersymmetric dark matter be used to set the energy scale of a linear $e^+ e^-$ collider. Assuming that the lightest supersymmetric particle (LSP) is a stable neutralino $\chi$, as...
Particles and cosmology: learning from cosmic rays (1999)
The density budget of the Universe is reviewed, and then specific particle candidates for non-bayonic dark matter are introduced, with emphasis on the relevance of cosmic-ray physics. The sizes of...
Charged-lepton-flavour violation in the light of the super-Kamiokande data (1999)
Ellis, Jonathan Richard, Gómez, M E, Leontaris, George K, Lola, S, Nanopoulos, Dimitri V
Motivated by the data from Super-Kamiokande and elsewhere indicating oscillations of atmospheric and solar neutrinos, we study charged-lepton-flavour violation, in particular the radiative decays mu...
Possible Accelerators @ CERN Beyond the LHC (1999)
The physics and world-wide accelerator context for possible accelerator projects at CERN after the LHC are reviewed, including the expectation that an e+ e- linear collider in the TeV energy range...
Gravitational-recoil effects on fermion propagation in space-time foam (1999)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Volkov, G
Motivated by the possible experimental opportunities to test quantum gravity via its effects on high-energy neutrinos propagating through space-time foam, we discuss how to incorporate spin...
Future of Heavy-Flavour Physics: Theoretical Perspective (1999)
The prospects for the coming Golden Age of heavy-flavour physics are discussed from the perspective of one who hopes it may provide a window onto physics beyond the Standard Model. Precise QCD...
Probing Models of Quantum Space-Time Foam (1999)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We review the possibility that quantum fluctuations in the structure of space-time at the Planck scale might be subject to experimental probes. We study the effects of space-time foam in an approach...
Scalar Glueball-Quarkonium Mixing and the Structure of the QCD Vacuum (1999)
Ellis, Jonathan Richard, Fujii, H, Kharzeev, Dima E
We use Ward identities of broken scale invariance to infer the amount of scalar glueball--$\bar{q}q$ meson mixing from the ratio of quark and gluon condensates in the QCD vacuum. Assuming dominance...
Logarithmic Operators Fold D branes into $AdS_{3}$ (1999)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Winstanley, E
We use logarithmic conformal field theory techniques to describe recoil effects in the scattering of two Dirichlet branes in D dimensions. In the particular case that a D1 brane strikes a D3 brane...
Hadronic Probes of the Polarized Intrinsic Strangeness of the Nucleon (1999)
Ellis, Jonathan Richard, Karliner, M M, Kharzeev, Dima E, Sapozhnikov, M G
We have previously interpreted the various large apparent violations of the naive Okubo-Zweig-Iizuka (OZI) rule found in many channels in $\bar{p}p$ annihilation at LEAR as evidence for an intrinsic...
Astrophysical Probes of the Constancy of the Velocity of Light (1999)
Ellis, Jonathan Richard, Farakos, K, Mavromatos, Nikolaos E, Mitsou, V A, Nanopoulos, Dimitri V
We discuss possible tests of the constancy of the velocity of light using distant astrophysical sources such as gamma-ray bursters (GRBs), Active Galactic Nuclei (AGNs) and pulsars. This speculative...
Higgs Mass Textures in Flipped SU(5) (1999)
Ellis, Jonathan Richard, Leontaris, George K, Rizos, J
We analyze the Higgs doublet-triplet mass splitting problem in the version of flipped SU(5) derived from string theory. Analyzing non-renormalizable terms up to tenth order in the superpotential, we...
Neutrino physics: Theory and Phenomenology (1999)
Various issues in neutrino phenomenology are reviewed, including: the possibility of large mixing angles in various models for neutrino masses, difficulties for degenerate neutrinos as candidates for...
Light-Cone Broadening and TeV Scale Extra Dimensions (1999)
Campbell-Smith, A, Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We examine the effect of light--cone broadening induced by quantum--gravity foam in the context of theories with ``large'' extra dimensions stretching between two parallel brane worlds. We consider...
Supergravity and Supersymmetry Breaking in Four and Five Dimensions (1999)
Ellis, Jonathan Richard, Lalak, Z, Pokorski, Stefan, Thomas, S
We discuss supersymmetry breaking in the field-theoretical limit of the strongly-coupled heterotic string compactified on a Calabi-Yau manifold, from the different perspectives of four and five...
Neutrino Masses, Mixing Angles and the Unification of Couplings in the MSSM (1999)
Carena, M S, Ellis, Jonathan Richard, Lola, S, Wagner, C E M
In the light of the gathering evidence for $\nu_{\mu}-\nu_{\tau}$ neutrino oscillations, coming in particular from the Super-Kamiokande data on atmospheric neutrinos, we re-analyze the unification of...
A Microscopic Recoil Model for Light-Cone Fluctuations in Quantum Gravity (1999)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We present a microscopic model for light-cone fluctuations ``in vacuo'', which incorporates a treatment of quantum-gravitational recoil effects induced by energetic particles. Treating defects in...
Theoretical Summary: 1999 Electroweak Session of the Rencontres de Moriond (1999)
The following aspects of the electroweak interactions are discussed, based on presentations here: the status of the Standard Model, CP violation, neutrino masses and oscillations, supersymmetry and...
Ellis, Jonathan Richard, Falk, T, Olive, Keith A, Srednicki, M A
Assuming that the lightest supersymmetric particle (LSP) is the lightest neutralino, we present a detailed exploration of neutralino-stau coannihilation channels, including analytical expressions and...
Ellis, Jonathan Richard, Neuffer, David V, Blondel, Alain
Muon Colliders - Prospective Physics (J. Ellis). Muon storage rings can address fundamental issues in neutrino physics, enable precision Higgs physics, and advance the high-energy frontier in...
Search for Quantum Gravity (1999)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
A satisfactory theory of quantum gravity may necessitate a drastic modification of our perception of space-time, by giving it a foamy structure at distances comparable to the Planck length. It is...
Quantum-Gravitational Diffusion and Stochastic Fluctuations in the Velocity of Light (1999)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We argue that quantum-gravitational fluctuations in the space-time background give the vacuum non-trivial optical properties that include diffusion and consequent uncertainties in the arrival times...
Can Neutrinos be Degenerate in Mass? (1999)
Ellis, Jonathan Richard, Lola, S
We reconsider the possibility that the masses of the three light neutrinos of the Standard Model might be almost degenerate and close to the present upper limits from Tritium beta decay and...
Comments on CP, T and CPT Violation in Neutral Kaon Decays (1999)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E
We comment on CP, T and CPT violation in the light of interesting new data from the CPLEAR and KTeV Collaborations on neutral kaon decay asymmetries. Other recent data from the CPLEAR experiment,...
Tests of the equivalence principle with neutral kaons (1999)
Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, ...
We test the Principle of Equivalence for particles and antiparticles, using CPLEAR data on tagged Pkao and Pkab decays into $pi^+ pi^-$. For the first time, we search for possible annual, monthly and...
Limits on Sparticle Dark Matter (1999)
Arguments are given that the lightest supersymmetric particle should be a neutralino $\chi$. Minimizing the fine tuning of the gauge hierarchy favours space of the MSSM from the stability of the...
On the Thermodynamics of a Gas of AdS Black Holes and the Quark-Hadron Phase Transition (1999)
Ellis, Jonathan Richard, Ghosh, A, Mavromatos, Nikolaos E
We discuss the thermodynamics of a gas of black holes in five-dimensional anti-de-Sitter (AdS) space, showing that they are described by a van der Waals equation of state. Motivated by the Maldacena...
Heavy-Ion Collisions and Black Holes in Anti-de-Sitter Space (1999)
Recent developments linking non-perturbative quantum gauge theories in Minkowski space to classical gravity theories in anti-de-Sitter space are reviewed at a simple level. It is suggested how these...
Learning Physics from the Cosmic Microwave Background (1999)
The Cosmic Microwave Background (CMB) provides a precious window on fundamental physics at very high energy scales, possibly including quantum gravity, GUTs and supersymmetry. The CMB has already...
Leptogenesis in the Light of Super-Kamiokande Data and a Realistic String Model (1999)
Ellis, Jonathan Richard, Lola, S, Nanopoulos, Dimitri V
We discuss leptogenesis in the light of indications of neutrino masses and mixings from Super-Kamiokande and other data on atmospheric neutrinos, as well as the solar neutrino deficit. Neutrino...
Probing the Structure of the Pomeron (1998)
Ellis, Jonathan Richard, Ross, Graham G, Williams, J
We suggest that the pseudo-rapidity cut dependence of diffractive deep-inelastic scattering events at HERA may provide a sensitive test of models of diffraction. A comparison with the experimental...
Berglund, P, Ellis, Jonathan Richard, Faraggi, A E, Nanopoulos, Dimitri V, Qiu, Z
We study the elliptic fibrations of some Calabi-Yau three-folds, including the $Z_2\times Z_2$ orbifold with $(h_{1,1},h_{2,1})=(27,3)$, which is equivalent to the common framework of realistic...
Particle Candidates for Dark Matter (1998)
Some particle candidates for dark matter are reviewed in the light of recent experimental and theoretical developments. Models for massive neutrinos are discussed in the light of the recent...
Beyond the Standard Model for Hillwalkers (1998)
In the first lecture, the Standard Model is reviewed, with the aim of seeing how its successes constrain possible extensions, the significance of the apparently low Higgs mass indicated by precision...
On Deep-Ocean $^{60}Fe$ as a Fossil of a Near-Earth Supernova (1998)
Fields, B D, Ellis, Jonathan Richard
Live $^{60}$Fe has recently been reported in a deep-ocean ferromanganese crust. Analysis of the isotopic ratios in the sample suggests that the measured $^{60}$Fe abundance exceeds the levels...
Five-Dimensional Gauged Supergravity and Supersymmetry Breaking in $M$ Theory (1998)
Ellis, Jonathan Richard, Lalak, Z, Pokorski, Witold
We extend the formulation of gauged supergravity in five dimensions, as obtained by compactification of $M$~theory on a deformed Calabi-Yau manifold, to include non-universal matter hypermultiplets....
Kinder-Geiger, Klaus, Ellis, Jonathan Richard, Heinz, Ulrich W, Wiedemann, Urs Achim
A new treatment of Bose-Einstein correlations is incorporated in a space-time parton-shower model for e+ e- annihilation into hadrons. Two alternative afterburners are discussed, and we use a simple...
Cosmological Fine Tuning, Supersymmetry, and the Gauge Hierarchy Problem (1998)
Chankowski, P H, Ellis, Jonathan Richard, Olive, Keith A, Pokorski, Stefan
We study the extent to which the cosmological fine-tuning problem - why the relic density of neutralino cold dark matter particles $\chi$ is similar to that of baryons - is related to the fine-tuning...
The Glueball Filter in Central Production and Broken Scale Invariance (1998)
Ellis, Jonathan Richard, Kharzeev, Dima E
We propose a possible explanation of the kinematical dependence of the central production of the scalar glueball candidate observed recently by the WA91 and WA102 Collaborations, and discussed by...
Time-Dependent Vacuum Energy Induced by $D$-Particle Recoil (1998)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We consider cosmology in the framework of a `material reference system' of D particles, including the effects of quantum recoil induced by closed-string probe particles. We find a time-dependent...
Sensitivity of Astrophysical Observations to Gravity-Induced Wave Dispersion in Vacuo (1998)
Amelino-Camelia, G, Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Sarkar, S
We discuss possible signatures of quantum gravity for the propagation of light, including an energy-dependent velocity (refractive index), dispersion in velocity at a given energy, and birefringence....
Ellis, Jonathan Richard, Falk, T, Olive, Keith A
We consider the effects of neutralino-stau coannihilations on the cosmological relic density of the lightest supersymmetric particle (LSP) $\chi$ in the minimal supersymmetric extension of the...
Ellis, Jonathan Richard, Mavromatos, Nikolaos E
We present a Liouville-string approach to confinement in four-dimensional gauge theories, which extends previous approaches to include non-conformal theories. We consider Liouville field theory on...
Bose-Einstein Final State Symmetrization for Event Generators of Heavy Ion Collisions (1998)
Wiedemann, Urs Achim, Ellis, Jonathan Richard, Heinz, Ulrich W, Kinder-Geiger, Klaus
We discuss algorithms which allow to calculate identical two-particle correlations from numerical simulations of relativistic heavy ion collisions. A toy model is used to illustrate their properties.
Haggling over the fine-tuning price of LEP (1998)
Chankowski, P H, Ellis, Jonathan Richard, Olechowski, M, Pokorski, Stefan
We amplify previous discussions of the fine-tuning price to be paid by supersymmetric models in the light of LEP data, especially the lower bound on the Higgs boson mass, studying in particular its...
Neutrino Textures in the Light of Super-Kamiokande Data and a Realistic String Model (1998)
Ellis, Jonathan Richard, Leontaris, George K, Lola, S, Nanopoulos, Dimitri V
Motivated by the Super-Kamiokande atmospheric neutrino data, we discuss possible textures for Majorana and Dirac neutrino masses within the see-saw framework. The main purposes of this paper are...
Topological $R^{4}$ Inflation (1998)
Ellis, Jonathan Richard, Kaloper, Nemanja, Olive, Keith A, Yokoyama, J
We consider the possibility that higher-curvature corrections in some variant of $M$ theory could drive inflation after the compactification to four dimensions. Assuming that the descent from eleven...
High-Energy QCD as a Topological Field Theory (1998)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E
We propose an identification of the conformal field theory underlying Lipatov's spin-chain model of high-energy scattering in perturbative QCD. It is a twisted N=2 supersymmetric topological field...
A personal selection is made of some of the hot topics debated at this conference, including examples of using our knowledge of QCD to make electroweak measurements, structure functions at low x in...
Five-Dimensional Aspects of M-Theory Dynamics and Supersymmetry Breaking (1998)
Ellis, Jonathan Richard, Lalak, Z, Pokorski, Stefan, Pokorski, Witold
We discuss the reduction of the eleven-dimensional M-theory effective Lagrangian, considering first compactification from eleven to five dimensions on a Calabi-Yau manifold, followed by reduction to...
A Microscopic Liouville Arrow of Time (1998)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We discuss the treatment of quantum-gravitational fluctuations in the space-time background as an `environment', using the formalism for open quantum-mechanical systems, which leads to a microscopic...
Estimates of Long-distance Contributions to the $B_{s}\to\gamma\gamma$ Decay (1998)
Choudhury, D, Ellis, Jonathan Richard
We present first calculations of new long-distance contributions to $B_s \to relevant $\gamma$ vertices are estimated using charge couplings and transition moment couplings. Within our uncertainties,...
World-Sheet formulation of M theory (1998)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We first review the interpretation of world-sheet defects as $D$ branes described by a critical theory in 11 dimensions, that we interpret as $M$ theory. We then show that $D$-brane recoil induces...
An Analysis of Diffraction in Deep-Inelastic Scattering (1998)
Bartels, Julius, Ellis, Jonathan Richard, Kowalski, H, Wüsthoff, M
We propose a simple parametrization for the deep-inelastic diffractive cross section. It contains the contribution of $q\bar{q}$ production to both the longitudinal and the transverse diffractive...
Toward the M(F)--Theory Embedding of Realistic Free-Fermion Models (1998)
Berglund, P, Ellis, Jonathan Richard, Faraggi, A E, Nanopoulos, Dimitri V, Qiu, Z
We construct a Landau-Ginzburg model with the same data and symmetries as a $Z_2\times Z_2$ orbifold that corresponds to a class of realistic free-fermion models. Within the class of interest, we...
Natural Candidates for Superheavy Dark Matter in String and M Theory (1998)
Benakli, Karim, Ellis, Jonathan Richard, Nanopoulos, Dimitri V
We reconsider superheavy dark matter candidates in string and M theory, in view of the possibility that inflation might generate superheavy particles with an abundance close to that required for a...
Hierarchies of R-violating interactions from Family Symmetries (1998)
Ellis, Jonathan Richard, Lola, S, Ross, Graham G
We investigate the possibility of constructing models of R-violating LQD Yukawa couplings using a single U(1) flavour-symmetry group and supermultiplet charge assignments that are compatible with the...
Ellis, Jonathan Richard, Falk, T, Ganis, G, Olive, Keith A, Schmitt, M
We analyze the LEP constraints from searches for charginos $\chi^{\pm}$ and neutralinos $\chi_i$, taking into account radiative corrections to the relations between their masses and the underlying...
Options for Future Colliders at CERN (1998)
Ellis, Jonathan Richard, Keil, Eberhard, Rolandi, G
We discuss options for future colliders at CERN, after the LHC, which should address the burning problems of particle physics: mass, flavour and unification. We give and comment upon parameter lists...
Physics at Future Colliders (1997)
After a brief review of the Big Issues in particle physics, we discuss the contributions to resolving that could be made by various planned and proposed future colliders. These include future runs of...
Irreversible Time Flow in a Two-Dimensional Dilaton Black Hole with Matter (1997)
Diamandis, G A, Ellis, Jonathan Richard, Georgalas, B C, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Papantonopoulos, E
We show that an exact solution of two-dimensional dilaton gravity with matter discovered previously exhibits an irreversible temporal flow towards flat space with a vanishing cosmological constant....
Hunting Down Interpretations of the HERA Large-$Q^{2}$ data (1997)
Possible interpretations of the HERA large-Q^2 data are reviewed briefly. The possibility of statistical fluctuations cannot be ruled out, and it seems premature to argue that the H1 and ZEUS...
Potential Sensitivity of Gamma-Ray Burster Observations to Wave Dispersion in Vacuo (1997)
Amelino-Camelia, G, Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Sarkar, S
The recent confirmation that gamma-ray bursters (GRBs) are indeed at cosmological distances raises the possibility that observations of these could provide interesting constraints on the fundamental...
The fine-tuning price of LEP (1997)
Chankowski, P H, Ellis, Jonathan Richard, Pokorski, Stefan
We quantify the amount of fine tuning of input parameters of the Minimal Supersymmetric Extension of the Standard Model (MSSM) that is needed to respect the lower limits on sparticle and Higgs masses...
Fermion Mass Textures in an M-Inspired Flipped SU(5) Model Derived from String (1997)
Ellis, Jonathan Richard, Leontaris, George K, Lola, S, Nanopoulos, Dimitri V
We are inspired by the facts that M-theory may reconcile the supersymmetric GUT scale with that of quantum gravity, and that it provides new avenues for low-energy supersymmetry breaking, to...
Decoherent Scattering of Light Particles in a D-Brane Background (1997)
Ellis, Jonathan Richard, Kanti, Panagiota, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Winstanley, E
We discuss the scattering of two light particles in a D-brane background. It is known that, if one light particle strikes the D brane at small impact parameter, quantum recoil effects induce...
Asymptotic Padé Approximant Predictions: up to Five Loops in QCD and SQCD (1997)
Ellis, Jonathan Richard, Jack, I, Jones, D R T, Karliner, M M, Samuel, Mark A
We use Asymptotic Padé Approximants (APAP's) to predict the four- and five-loop \beta-functions in QCD and N=1 supersymmetric QCD (SQCD), as well as the quark mass anomalous dimensions in Abelian...
Report of the Working Group on "W Mass and QCD" (1997)
Ballestrero, A, Charlton, D G, Cowan, G D, Dornan, Peter J, Edgecock, R, Ellis, Jonathan Richard, ...
The W Mass and QCD Working Group discussed a wide variety of topics relating to present and future measurements of M(W) at LEP2, including QCD backgrounds to W+W- production. Particular attention was...
M-Theory Model-Building and Proton Stability (1997)
Ellis, Jonathan Richard, Faraggi, A E, Nanopoulos, Dimitri V
We study the problem of baryon stability in M theory, starting from realistic four-dimensional string models constructed using the free-fermion formulation of the weakly-coupled heterotic string....
Calculations of One-Loop Supersymmetric Corrections to Large-$E_T$ Jet Cross Sections (1997)
Ellis, Jonathan Richard, Ross, D A
We have calculated the one-loop supersymmetric corrections to the 2 to 2 parton scattering subprocesses antiq q to antiq q, antiq q to g g, g q to g q and g g to g g, including form-factor...
Report of the 1997 LEP2 Phenomenology Working Group on "Searches" (1997)
Allanach, Benjamin C, Blair, G A, Díaz, M A, Dreiner, H, Ellis, Jonathan Richard, Igo-Kemenes, P, ...
The Searches Working Group discussed a variety of topics relating to present and future measurements of searches at LEP 2. The individual contributions are included separately.
Phenomenology of LEP 2 Physics (1997)
Various aspects of physics at LEP 2 are reviewed from a phenomenological point of view. We first discuss the search for Higgs bosons, which might be relatively light if indications from the precision...
Padé approximants, optimal renormalization scales, and momentum flow in Feynman diagrams (1997)
Brodsky, S J, Ellis, Jonathan Richard, Gardi, E, Karliner, M M, Samuel, Mark A
We show that the Padé Approximant (PA) approach for resummation of perturbative series in QCD provides a systematic method for approximating the flow of momentum in Feynman diagrams. In the...
Vacuum Fluctuations and Decoherence in Mesoscopic and Microscopic Systems (1997)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We discuss recent experimental evidence of decoherence in a laboratory mesoscopic system in a cavity, from which we draw analogies with the decoherence that we argue is induced by microscopic...
M Theory from World-Sheet Defects in Liouville String (1997)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We have argued previously that black holes may be represented in a D-brane approach by monopole and vortex defects in a sine-Gordon field theory model of Liouville dynamics on the world sheet....
Constraints on Neutralino Dark Matter from LEP 2 and Cosmology (1997)
Ellis, Jonathan Richard, Falk, T, Olive, Keith A, Schmitt, M
A significant lower limit on the mass of the lightest neutralino \chi can be obtained by combining the results from sparticle searches at LEP at centre-of-mass energies up to 172 GeV with...
Pursuing the Strange Stop Interpretation of the HERA Large $Q^2$ data (1997)
Ellis, Jonathan Richard, Lola, S, Sridhar, K
We explore the possible interpretation of the large-$Q^2$ anomaly reported by the H1 and ZEUS collaborations in terms of stop squark production off a strange quark in the proton via an R-violating...
Quantum Decoherence in a D-Foam Background (1997)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Within the general framework of Liouville string theory, we construct a model for quantum D-brane fluctuations in the space-time background through which light closed-string states propagate. The...
Signatures of Parton Exogamy in $e^+ e^- \to W^+ W^- \to$ hadrons (1997)
Ellis, Jonathan Richard, Kinder-Geiger, Klaus
We propose possible signatures of `exogamous' combinations between partons in the different W+ and W- hadron showers in e+e- -> W+W- events with purely hadronic final states. Within the space-time...
Pursuing interpretations of the HERA large-$Q^{2}$ data (1997)
Altarelli, Guido, Ellis, Jonathan Richard, Lola, S, Giudice, Gian Francesco, Mangano, Michelangelo L
We explore interpretations of the anomaly observed by H1 and ZEUS at HERA in deep-inelastic e^+ p scattering at very large Q^2. We discuss the possibilities of new effective interactions and the...
Flavour-Dependent and Basis Independent Measures of R Violation (1997)
Davidson, Sacha, Ellis, Jonathan Richard
We construct lepton flavour-dependent and basis-independent measures of R-parity violation in the minimal supersymmetric extension of the Standard Model (MSSM). We work in the context of exact...
On the Space-Time Uncertainty Relations of Liouville Strings and D Branes (1997)
Amelino-Camelia, G, Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Within a Liouville approach to non-critical string theory, we argue for a non-trivial commutation relation between space and time observables, leading to a non-zero space-time uncertainty relation...
Unification Bounds on the Possible N=2 Supersymmetry-Breaking Scale (1997)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Leontaris, George K
In this letter, the possible appearance of N=2 supersymmetry at a low energy scale is investigated in the context of unified theories. Introducing mirror particles for all the gauge and matter...
A Fresh Look at Axions and SN 1987A (1997)
Keil, W, Janka, H T, Schramm, David N, Sigl, G, Turner, M S, Ellis, Jonathan Richard
We re-examine the very stringent limits on the axion mass based on the strength and duration of the neutrino signal from SN 1987A, in the light of new measurements of the axial-vector coupling...
Supersymmetry, Supergravity and $R_b$ revisited in the light of LEP 2 (1996)
Ellis, Jonathan Richard, López, J L, Nanopoulos, Dimitri V
A previous study of supersymmetric models has indicated that they are unlikely to make a large contribution to R_b. We revisit this analysis, taking into account the improved lower limits on...
Outlook on Neutrino Physics (1996)
Some of the hot topics in neutrino physics are discussed, with particular emphasis on neutrino oscillations. After proposing credibility criteria for assessing various claimed effects, particular...
A Prediction for the 4-Loop $\beta$ Function (1996)
Ellis, Jonathan Richard, Karliner, M M, Samuel, Mark A
We predict that the four-loop contribution \beta_3 to the QCD \beta function in the MS-bar prescription is given by \beta_3\simeq 23,600(900) - 6,400(200) N_f + 350(70) N_f^2 + 1.5 N_f^3, where N_f...
The $\Delta I = 1/2 $ Rule in the Light of Two-Dimensional QCD (1996)
Ellis, Jonathan Richard, Frishman, Yitzhak, Hanany, A, Karliner, M M
We calculate in QCD$_2$ the ratios of baryonic matrix elements of $\Delta I = 2$ and $\Delta I = 0$ four-fermion operators, with a view to understanding better the mechanism of $\Delta I = 1/2$...
Current Issues in the Phenomenology of Particle Physics (1996)
The present status of the Standard Model and its experimental tests are reviewed, including indications on the likely mass of the Higgs boson. Also discussed are the motivations for supersymmetry and...
Problems and Prospects in Spin Physics (1996)
This talk reviews some of the hot topics in spin physics and related subjects, including perturbative QCD predictions for polarized parton distributions and their possible behaviours at small x, the...
Analysis of LEP Constraints on Supersymmetric Models with a Light Gravitino (1996)
Ellis, Jonathan Richard, López, J L, Nanopoulos, Dimitri V
We propose an analysis of LEP constraints on radiative neutralino decays into a light gravitino, based on the plane of the Higgs mixing parameter mu and the SU(2) gaugino mass M_2. The preliminary...
Accelerator Constraints on Neutralino Dark Matter (1996)
Ellis, Jonathan Richard, Falk, T, Olive, Keith A, Schmitt, M
The constraints on neutralino dark matter \chi obtained from accelerator searches at LEP, the Fermilab Tevatron and elsewhere are reviewed, with particular emphasis on results from LEP 1.5. These...
D-Brane Recoil Mislays Information (1996)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We discuss the scattering of a light closed-string state off a $D$ brane, taking into account quantum recoil effects on the latter, which are described by a pair of logarithmic operators. The...
Basis-Independent Measures of R-parity Violation (1996)
Davidson, Sacha, Ellis, Jonathan Richard
We construct basis-independent expressions that measure the magnitude of $R$-parity breaking due to possible superpotential terms in the Minimal Supersymmetric extension of the Standard Model, in the...
Hadronic Antenna Patterns to Distinguish Production Mechanisms for Large-$E_T$ jets (1996)
Ellis, Jonathan Richard, Khoze, V A, Stirling, William James
Hadronic antenna patterns provide a tool able to diagnose different patterns of colour flow in large-E_T jet events. They reflect the underlying short-distance dynamics, and are sensitive to colour...
Ellis, Jonathan Richard, Fogli, G L, Lisi, E
An updated fit to the precision electroweak data and to the direct measurement of the top quark mass $m_t$ provides significant constraints on $m_t$ and on the Higgs boson mass $M_H$:...
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We discuss the possibility that CPT violation may appear as a consequence of microscopic decoherence due to quantum-gravity effects, that we describe using a density-matrix formalism motivated by our...
Renormalization-Scheme Dependence of Padé Summation in QCD (1996)
Ellis, Jonathan Richard, Gardi, E, Karliner, M M, Samuel, Mark A
We study the renormalization-scheme (RS) dependence of Padé Approximants (PA's), and compare them with the Principle of Minimal Sensitivity (PMS) and the Effective Charge (ECH) approaches. Although...
Supersymmetric dark matter in the light of LEP1.5 (1996)
Ellis, Jonathan Richard, Falk, T, Olive, Keith A, Schmitt, M
We discuss the lower limit on the mass of the neutralino \chi that can be obtained by combining data from e^+e^- annihilation at LEP and elsewhere with astrophysical and theoretical considerations....
Distance measurement and wave dispersion in a Liouville-string approach to quantum gravity (1996)
Amelino-Camelia, G, Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Within a Liouville approach to non-critical string theory, we discuss space-time foam effects on the propagation of low-energy particles. We find an induced frequency-dependent dispersion in the...
Ellis, Jonathan Richard, Kinder-Geiger, Klaus, Kowalski, H
We extend a quantum kinetic approach to the description of hadronic showers in space, time and momentum space to deep-inelastic ep collisions, with particular reference to experiments at HERA. We...
Geological isotope anomalies as signatures of nearby supernovae (1996)
Ellis, Jonathan Richard, Fields, B D, Schramm, David N
Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass of material...
D-branes from Liouville strings (1996)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We develop quantization aspects of our Liouville approach to non-critical strings, proposing a path-integral formulation of a second quantization of string theory, that incorporates naturally the...
Virtual-sparticle threshold effects on large E$_{T}$ jet cross sections (1996)
Ellis, Jonathan Richard, Ross, D A
We discuss the one-loop virtual-sparticle corrections to QCD jet cross sections at large E_T and large dijet invariant masses, with reference to present Tevatron and future LHC collider experiments....
Can one probe the structure function of the pomeron? (1996)
Ellis, Jonathan Richard, Ross, Graham G
We discuss whether the diffractive structure functions defined by current experiments at HERA are indeed probing the partonic structure function of the pomeron. We observe that the {\it...
Searching for relic neutralinos using neutrino telescopes (1996)
Berezinsky, Veniamin Sergeevich, Bottino, A, Ellis, Jonathan Richard, Fornengo, N, Mignola, G, Scopel, S
Neutrino telescopes of large area offer the possibility of searching for indirect signals of relic neutralinos in the galactic halo, due to annihilations in the Sun or the Earth. Here we investigate...
Comparison of the Padé approximation method to perturbative QCD calculations (1996)
Samuel, Mark A, Ellis, Jonathan Richard, Karliner, M M
We present a method of estimating perturbative coefficients in Quantum Field Theory using Padé Approximants. We test this method on various known QCD results, and find that the method works very...
Astroparticle physics: a personal outlook (1996)
At the request of the organizers, this talk surveys some of the hot topics discussed at this meeting, giving my {\it subjective views} on them. Subjects covered include the present age and Hubble...
Quantum decoherence in a four-dimensional black hole background (1996)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V, Winstanley, E
We display a logarithmic divergence in the density matrix of a scalar field in the presence of an Einstein-Yang-Mills black hole in four dimensions. This divergence is related to a previously-found...
Ellis, Jonathan Richard, Alvarado-Flores, R
Supersymmetric model contributions to the neutron electric dipole moment arise via quark electric dipole moment operators, whose matrix elements are usually calculated using the Naive Quark Model...
The strange spin of the nucleon (1996)
Ellis, Jonathan Richard, Karliner, M M
The recent series of experiments on polarized lepton-nucleon scattering have provided a strange new twist in the story of the nucleon, some of whose aspects are reviewed in these lectures. In the...
Supersymmetry and grand unification (1995)
Supersymmetry and Grand Unification are the two most promising directions for physics beyond the Standard Model. They receive indirect experimental support from the apparent lightness of the Higgs...
Testing the standard model and beyond (1995)
This paper is based on lectures presented to mathematical physicists and attempts to provide an overview of the present status of the Standard Model, its experimental tests, phenomenological and...
Supersymmetry and R$_{b}$ in the light of LEP 1.5 (1995)
Ellis, Jonathan Richard, López, J, Nanopoulos, Dimitri V
We re-examine the possible magnitude of the supersymmetric contribution to R_b\equiv\Gamma(Z^0\to\bar b b)/\Gamma(Z^0\to{\rm all}) in the light of the constraints imposed by the absence of light...
Space, time and color in hadron production via e+ e- --> Z$^{0}$ and e+ e- --> W$^{+}$W$^{-}$ (1995)
Ellis, Jonathan Richard, Kinder-Geiger, Klaus
The time-evolution of jets in hadronic e+ e- events at LEP is investigated in both position- and momentum-space, with emphasis on effects due to color flow and particle correlations. We address...
Test of CPT symmetry and quantum mechanics with experimental data from CPLEAR (1995)
Adler, R, Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bee, C P, ...
We use fits to recent published CPLEAR data on neutral kaon decays to \pi^+\pi^- and \pi e\nu to constrain the CPT--violation parameters appearing in a formulation of the neutral kaon system as an...
Ellis, Jonathan Richard, Karliner, M M
We review the theory of polarized deep inelastic scattering in light of the most recent experimental data. We discuss the nucleon spin decomposition and the Bjorken sum rule. The latter is used for...
Lowering $\alpha_{s}$ by flipping SU(5) (1995)
Ellis, Jonathan Richard, López, J, Nanopoulos, Dimitri V
We show that the prediction for \alpha_s(M_Z) in flipped SU(5) is naturally lower than in minimal SU(5), and that the former can accommodate the full range of \alpha_s(M_Z) presently allowed by...
Padé approximants, Borel transforms and renormalons: the Bjorken sum rule as a case study (1995)
Ellis, Jonathan Richard, Gardi, E, Karliner, M M, Samuel, Mark A
We prove that Padé approximants yield increasingly accurate predictions of higher-order coefficients in QCD perturbation series whose high-order behaviour is governed by a renormalon. We also prove...
Neutralino dark matter in supersymmetric models with non-universal scalar mass terms (1995)
Berezinsky, Veniamin Sergeevich, Bottino, A, Ellis, Jonathan Richard, Fornengo, N, Mignola, G, Scopel, S
Neutralino dark matter is studied in the context of a supergravity scheme where the scalar mass terms are not constrained by universality conditions at the grand unification scale. We analyse in...
The Higgs boson mass from precision electroweak data (1995)
Ellis, Jonathan Richard, Fogli, G L, Lisi, E
We present a new global fit to precision electroweak data, including new low- and high-energy data and analyzing the radiative corrections arising from the minimal symmetry breaking sectors of the...
Experimental tests of CPT symmetry and quantum mechanics at CPLEAR (1995)
Mavromatos, Nikolaos E, Ellis, Jonathan Richard, López, J L, Nanopoulos, Dimitri V, Adler, R, Alhalel, T, ...
We review a phenomenological parametrization of an open quantum-mechanical formalism for CPT violation in the neutral kaon system, and constrain the parameters using fits to recent CPLEAR data.
The proton spin puzzle and $\Lambda$ polarization in deep-inelastic scattering (1995)
Ellis, Jonathan Richard, Kharzeev, Dima E, Kotzinian, A M
We point out that measurements of longitudinal \Lambda polarization in the target fragmentation region of deep--inelastic \nu \,N and \mu \,N or e \, N scattering may test dynamical mechanisms...
Search for large rapidity gap events in e+e- annihilation (1995)
Ellis, Jonathan Richard, Ross, D A
We Investigate the cross-section for the production of a low mass colour-singlet cluster in e^+ e^- annihilation with a large rapidity gap between the colour-singlet cluster and the other jets. It is...
On the thermal regeneration rate for light gravitinos in the early universe (1995)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A, Rey, S J
We investigate the light gravitino regeneration rate in the early Universe in models based on N=1 supergravity. Motivated by a recent claim by Fischler, we evaluate finite-temperature effects on the...
Precision tests of CPT symmetry and quantum mechanics in the neutral kaon system (1995)
Ellis, Jonathan Richard, López, J L, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We present a systematic phenomenological analysis of the tests of CPT symmetry that are possible within an {\em open} quantum-mechanical description of the neutral kaon system that is motivated by...
Where are we coming from? What are we? Where are we going? (1995)
The Standard Model is the answer to questions 1 and 2, as established by LEP. Supersymmetry is doubtless the answer to question 3, as may well be established by the LHC.
A string scenario for inflationary cosmology (1995)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We describe a scenario for inflation in the framework of non-critical string theory, which does not employ an inflaton field. There is an exponential expansion of the volume of the Universe, induced...
Real-time description of parton-hadron conversion and confinement dynamics (1995)
Ellis, Jonathan Richard, Kinder-Geiger, Klaus
We propose a new and universal approach to the hadronization problem that incorporates both partonic and hadronic degrees of freedom in their respective domains of relevance, and that describes the...
The proton spin puzzle and depolarization in $\overline{p}$p --> $\overline{\Lambda}\Lambda$ (1995)
Alberg, M A, Ellis, Jonathan Richard, Kharzeev, Dima E
We point out that the measurement of target spin depolarization D_{nn} in the \bar{p}p\to\bar{\Lambda}\Lambda reaction may test dynamical mechanisms invoked to explain the proton spin puzzle revealed...
New LEP constraints on some supersymmetric Yukawa interactions that violate R-parity (1995)
Bhattacharya, G, Ellis, Jonathan Richard, Sridhar, K
We consider one-loop corrections to partial widths of the Z induced by supersymmetric Yukawa interactions that violate R-parity. The precise experimental values of the leptonic Z partial widths bound...
Real-time dynamics of parton-hadron conversion (1995)
Ellis, Jonathan Richard, Kinder-Geiger, Klaus
We propose a new and universal approach to the hadronization problem that incorporates both perturbative QCD and effective field theory in their respective domains of validity and that models the...
Ellis, Jonathan Richard, Karliner, M M, Kharzeev, Dima E, Sapozhnikov, M G
A large apparent violation of the OZI rule has recently been found in many channels in pbar-p annihilation LEAR. An interpretation of these data in terms of the "shake-out" and "rearrangement" of an...
Ellis, Jonathan Richard, Karliner, M M, Samuel, Mark A, Steinfelds, E
We use Padé Approximants to obtain improved predictions for the anomalous magnetic moments of the electron and the muon. These are needed because of the very precise experimental values presently...
Ellis, Jonathan Richard, Karliner, M M
New data on polarized \mu-p and e-p scattering permit a first determination of \alpha_s using the Bjorken sum rule, as well as higher precision in determining the nucleon spin decomposition. Using...
Bounds on the masses and couplings of leptoquarks from leptonic partial widths of the Z (1994)
Bhattacharya, G, Ellis, Jonathan Richard, Sridhar, K
The vertex corrections to the leptonic partial widths of the Z induced by leptoquarks that couple leptons to the top quark are considered. We obtain stringent bounds on the parameter space of the...
Some physical aspects of Liouville string dynamics (1994)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We discuss some physical aspects of our Liouville approach to non-critical strings, including the emergence of a microscopic arrow of time, effective field theories as classical ``pointer'' states in...
A non-critical string approach to black holes, time and quantum dynamics (1994)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We review our approach to time and quantum dynamics based on non-critical string theory, developing its relationship to previous work on non-equilibrium quantum statistical mechanics and the...
A Liouville string approach to microscopic time and cosmology (1993)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
In the non-critical string framework that we have proposed recently, the time $t$ is identified with a dynamical local renormalization group scale, the Liouville mode, and behaves as a statistical...
Spin structure functions (1993)
Ellis, Jonathan Richard, Karliner, M M
which are consistent with chiral soliton models and indications from lattice estimates. We also mention the prospects for future experiments on the spin structure of the nucleon.
Analysis of data on polarized lepton-nucleon scattering (1993)
Ellis, Jonathan Richard, Karliner, M M
We re-analyze data on deep inelastic polarized lepton-nucleon scattering, with particular attention to testing the Bjorken sum rule and estimating the quark contributions to the nucleon spin. Since...
Valleys in string foam suppress quantum coherence (1993)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
A string derivation of the super S matrix (1993)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Flipped angles and phases: a systematic study (1993)
Ellis, Jonathan Richard, López, J L, Nanopoulos, Dimitri V, Olive, Keith A
We discuss systematically the fermion mass and mixing matrices in a generic \linebreak field-theoretical flipped $SU(5)$ model, with particular applications to neutrino and baryon number-changing...
Perturbative QCD data are consistent with light gluinos (1993)
Ellis, Jonathan Richard, Ross, D A, Nanopoulos, Dimitri V
We discuss systematically the consistency of light gluinos with data on perturbative QCD from deep inelastic scattering, quarkonia, jets at LEP, and the total hadronic cross-section in ${e^+ e^-}$...
Could a nearby supernova explosion have caused a mass extinction? (1993)
Ellis, Jonathan Richard, Schramm, David N
We examine the possibility that a nearby supernova explosion could have caused one or more of the mass extinctions identified by palaeontologists. We discuss the likely rate of such events in the...
CPT violation in string-modified quantum mechanics and the neutral kaon system (1992)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We show that $CPT$ is in general violated in a non-quantum-mechanical way in the effective low-energy theory derived from string theory, as a result of apparent world-sheet charge non-conservation...
Flipped heavy neutrinos: from the solar neutrino problem to baryogenesis (1992)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A
On the baryon, lepton-flavour and right-handed electron asymmetries of the universe (1992)
Campbell, Bruce A, Davidson, Sacha, Ellis, Jonathan Richard, Olive, Keith A
Non-perturbative electroweak effects, in thermal equilibrium in the early universe, have the potential to erase the baryon asymmetry of the universe, unless it is encoded in a B-L asymmetry, or in...
The string universe: high T$_{c}$ superconductor or quantum Hall conductor? (1992)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Our answer is the latter. Space-time singularities, including the initial one, are described by world-sheet topological Abelian gauge theories with a Chern-Simons term. Their effective $N=2$...
String theory modifies quantum mechanics (1992)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We argue that the light particles in string theory obey an effective quantum mechanics modified by the inclusion of a quantum-gravitational friction term, induced by unavoidable couplings to...
Testing quantum mechanics in the neutral kaon system (1992)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
The neutral kaon system is a sensitive probe of quantum mechanics. We revive a parametrization of non-quantum-mechanical effects that is motivated by considerations of the nature of space-time foam,...
World-sheet duality, space-time foam, and the quantum fate of a stringy black hole (1992)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We interpret Minkowski black holes as world-sheet {\it spikes } which are related by world-sheet { \it duality} to {\it vortices } that correspond to Euclidean black holes. These world-sheet defects...
The origin of space-time as W symmetry breaking in string theory (1992)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Constraints from gauge coupling unification on the scale of supersymmetry breaking (1992)
Ellis, Jonathan Richard, Kelley, S, Nanopoulos, Dimitri V
We reanalyze precision LEP data and coupling constant unification in the minimal supersymmetric $SU(5)$ model including the evolution of the gaugino masses. We derive general bounds on the primordial...
On the W-hair of string black holes and the singularity problem (1992)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We argue that the infinitely many gauge symmetries of string theory provide an infinite set of conserved (gauge) quantum numbers (W-hair) which characterise black hole states and maintain quantum...
Quark solitons as constituents of hadrons (1992)
Ellis, Jonathan Richard, Frishman, Yitzhak, Hanany, A, Karliner, M M
We exhibit static solutions of multi-flavour QCD in two dimensions that have the quantum numbers of baryons and mesons, constructed out of quark and anti-quark solitons. In isolation the latter...
Measuring the W-hair of string black holes (1992)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Quantum Mechanics and Black Holes in Four-Dimensional String Theory (1992)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
In previous papers we have shown how strings in a two-dimensional target space reconcile quantum mechanics with general relativity, thanks to an infinite set of conserved quantum numbers, ``W-hair'',...
On the Evaporation of Black Holes in String Theory (1991)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
We show that, in string theory, the quantum evaporation and decay of black holes in two-dimensional target space is related to imaginary parts in higher-genus string amplitudes. These arise from the...
Constituent quarks as solitons (1991)
Ellis, Jonathan Richard, Frishman, Yitzhak, Karliner, M M
We exhibit soliton solutions of QCD in two dimensions that have the quantum numbers of quarks. They exist only for quarks heavier than the dimensional gauge coupling, and have infinite energy,...
On the connection between quantum mechanics and the geometry of two-dimensional strings (1991)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
On the basis of an area-preserving symmetry in the phase space of a one-dimensional matrix model - believed to describe two-dimensional string theory in a black-hole background which also allows for...
The price of deriving the Standard Model from string (1991)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Kelley, S, Nanopoulos, Dimitri V
The supersymmetric charged Higgs boson mass and LEP phenomenology (1991)
Brignole, A, Ellis, Jonathan Richard, Ridolfi, G, Zwirner, Fabio
String threshold corrections and flipped SU(5) (1991)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Lacaze, R, Nanopoulos, Dimitri V
Quantum coherence and two-dimensional black holes (1991)
Ellis, Jonathan Richard, Mavromatos, Nikolaos E, Nanopoulos, Dimitri V
Astrophysical constraints on massive unstable neutral relic particles (1991)
Ellis, Jonathan Richard, Gelmini, Graciela B, López, J L, Nanopoulos, Dimitri V, Sarkar, S
LEP data and the light gluino window (1991)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Nanopoulos, Dimitri V
Alternative symmetry breaking and exotica (1991)
Dimopoulos, Savas K, Lindner, Manfred, Argyres, E N, Baur, Ulrich, Casalbuoni, Roberto, Chiappetta, P, ...
Comments on "Cosmological string solutions" (1991)
Antoniadis, Ignatios, Bachas, C P, Ellis, Jonathan Richard, Nanopoulos, Dimitri V
Cosmological baryon asymmetry constraints on extensions of the Standard Model (1990)
Campbell, Bruce A, Davidson, Sacha, Ellis, Jonathan Richard, Olive, Keith A
Phase transitions in QCD and string theory (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Kalara, S, Nanopoulos, Dimitri V, Olive, Keith A
Left-handed currents and CP violation (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V
Dark matter in the light of LEP (1990)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Roszkowski, Leszek, Schramm, David N
A new approach to supersymmetry breaking in superstring models (1990)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Lahanas, Athanasios B, Nanopoulos, Dimitri V
An expanding universe in string theory (1990)
Antoniadis, Ignatios, Bachas, C P, Ellis, Jonathan Richard, Nanopoulos, Dimitri V
Scales in superstring models (1990)
Cohen, E, Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V
On the possibility of avoiding singularities by dilaton emission (1990)
Antoniadis, Ignatios, Ellis, G F R, Ellis, Jonathan Richard, Kounnas, Costas, Nanopoulos, Dimitri V
Beyond the standard model: summary report of the Physics-2 working group (1990)
Angelopoulos, V D, Bagnaia, P, Barbiellini, Guido, Batley, J Richard, Bloch, D, Blondel, A, ...
Search for supersymmetry at the $\overline{p}$p collider (1990)
Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V, Srednicki, M A
Gaugino masses and grand unification (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Tamvakis, Kyriakos
No-scale supergravity models with a Planck mass gravitino (1990)
Ellis, Jonathan Richard, Kounnas, Costas, Nanopoulos, Dimitri V
Light Higgs bosons and supersymmetry (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Ritz, S
Superstring compactification and supersymmetry breaking (1990)
Cohen, E, Ellis, Jonathan Richard, Gómez, C, Nanopoulos, Dimitri V
Cosmological constraints on supergravity models (1990)
Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V
Squark decays into gauginos at the p$\overline{p}$ collider (1990)
Baer, Howard W, Ellis, Jonathan Richard, Gelmini, Graciela B, Nanopoulos, Dimitri V, Tata, Xerxes
Alternative superstring compactifications will not give new low-energy models (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Nanopoulos, Dimitri V
Flipped SU(5) from manifold compactification of the ten-dimensional heterotic string (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V, Ticciati, R
Aspects of the super-unification of strong, electroweak and gravitational interactions (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Zwirner, Fabio
Phenomenological SU(1,1) supergravity (1990)
Ellis, Jonathan Richard, Kounnas, Costas, Nanopoulos, Dimitri V
Gaugino masses from radiative corrections in superstring models (1990)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Quirós, Mariano, Zwirner, Fabio
Baryogenesis and entropy generation in a superstring model (1990)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A
A useful angular variable for the analysis of three-jet events in p$\overline{p}$ collisions (1990)
Ellis, Jonathan Richard, Karliner, I, Stirling, William James
Comments on intermediate-scale models (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Olive, Keith A
Supersymmetry breaking in the observable sector of superstring models (1990)
Ellis, Jonathan Richard, Lahanas, Athanasios B, Nanopoulos, Dimitri V, Quirós, Mariano, Zwirner, Fabio
Search for neutral Higgs at LEP 200 (1990)
Boucrot, J, Hilgart, J M, Loucatos, Sotirios S, Mermikides, Michael E, Ritz, S, Wu Sau Lan, ...
Comments on the possibility of electroweak baryon number violation at high temperatures (1990)
Ellis, Jonathan Richard, Alvarado-Flores, R, Rudaz, S, Seckel, D
Supersymmetric flipped SU(5) revitalized (1990)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V
Can the superstring inspire the standard model? (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Olive, Keith A
Neutral currents within and beyond the standard model (1990)
Costa, G, Ellis, Jonathan Richard, Fogli, G L, Nanopoulos, Dimitri V, Zwirner, Fabio
Superstring models challenged by rare processes (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Enqvist, Kari, Gaillard, Mary Katherin, Nanopoulos, Dimitri V
Indirect searches for leptoquarks at present and future colliders (1990)
Dreiner, H, Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Tracas, Nicholas D, Vlachos, N D
Supercosmology revitalized (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V, Olive, Keith A
More flipped SU(5) x U(1) baryosynthesis (1990)
Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V, Olive, Keith A
Cosmic ray constraints on the annihilations of relic particles in the galactic halo (1990)
Ellis, Jonathan Richard, Alvarado-Flores, R, Freese, Katherine, Ritz, S, Seckel, D, Silk, J
Low-mass photinos and supernova 1987a (1990)
Ellis, Jonathan Richard, Olive, Keith A, Sarkar, S, Sciama, Dennis William
Can Q-balls save the universe from intermediate-scale phase transitions? (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Olive, Keith A
Wormhole effects on the masses of spin-0 bosons and spin-1/2 fermions (1990)
Ellis, Jonathan Richard, Floratos, Emmanuel G, Nanopoulos, Dimitri V
Parity violation in light atoms and the strange spin content of the proton (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Alvarado-Flores, R
Density-dependent couplings and astrophysical bounds on light scalar particles (1990)
Ellis, Jonathan Richard, Kalara, S, Olive, Keith A, Wetterich, C
On the polarization of gluons in the proton (1990)
Ellis, Jonathan Richard, Karliner, M M, Sachrajda, Christopher T C
Universality of the mass spectrum in closed string models (1990)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Nanopoulos, Dimitri V
Aspects of the flipped unification of strong, weak and electromagnetic interactions (1990)
Ellis, Jonathan Richard, Hagelin, John S, Kelley, S, Nanopoulos, Dimitri V
A very light gravitino in a no-scale model (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V
Towards a supersymmetric cosmology (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Gelmini, Graciela B, Kounnas, Costas, Masiero, A, Nanopoulos, Dimitri V, ...
Problems for (2,0) compactifications (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Olive, Keith A, Quirós, Mariano, Zwirner, Fabio
Superstring dark matter (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Hagelin, John S, Olive, Keith A
Higgs mixing in supergravity (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Tamvakis, Kyriakos
Difficulties with interpretations of underground muons from Cygnus X-3 (1990)
Berezinsky, Veniamin Sergeevich, Ellis, Jonathan Richard, Ioffe, B L
World sheet instanton effects on no-scale structure (1990)
Ellis, Jonathan Richard, Gómez, C, Nanopoulos, Dimitri V, Quirós, Mariano
Vanishing scalar masses in no-scale supergravity (1990)
Diamandis, G A, Ellis, Jonathan Richard, Lahanas, Athanasios B, Nanopoulos, Dimitri V
The low-energy effective field theory from four dimensional superstrings (1990)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Floratos, Emmanuel G, Nanopoulos, Dimitri V, Tomaras, T N
Inflationary fluctuations, entropy generation and baryogenesis in a cold universe (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Olive, Keith A
Phenomenological studies of rank-5 Calabi-Yau models (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Kalara, S, Nanopoulos, Dimitri V, Olive, Keith A
GUT model-building with fermionic four-dimensional strings (1990)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V
Experimental predictions from the superstring (1990)
Cohen, E, Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V
Strangeness in nucleon decay (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Nanopoulos, Dimitri V
Effects of a superstring gauge boson on high energy e+e- annihilation and ep scattering (1990)
Angelopoulos, V D, Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Tracas, Nicholas D
Search for violations of quantum mechanics (1990)
Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V, Srednicki, M A
Observables in low-energy superstring models (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Zwirner, Fabio
Gauginos and Higgs particles in superstring models (1990)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Petcov, S T, Zwirner, Fabio
Non-compact supergravity solves problems (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V
Cosmic strings from hidden-sector flux tubes (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A, Rudaz, S
An improved flipped SU(5) x U(1) model from four-dimensional string (1990)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V
Problems for light higgsinos (1990)
Drees, Manuel, Ellis, Jonathan Richard, Jetzer, P, Sciama, Dennis William
Cosmological baryogenesis in superstring models with stable protons (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A
No-scale supersymmetric standard model (1990)
Ellis, Jonathan Richard, Lahanas, Athanasios B, Nanopoulos, Dimitri V, Tamvakis, Kyriakos
Search for new quarks suggested by the superstring (1990)
Angelopoulos, V D, Ellis, Jonathan Richard, Kowalski, H, Nanopoulos, Dimitri V, Tracas, Nicholas D, Zwirner, Fabio
Problems for superstring models with vacuum expectation values for conjugate sneutrinos (1990)
Campbell, Bruce A, Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V, Olive, Keith A
Primordial nucleosynthesis, additional neutrinos and neutral currents from the superstring (1990)
Ellis, Jonathan Richard, Enqvist, Kari, Nanopoulos, Dimitri V, Sarkar, S
The flipped SU(5) x U(1) string model revamped (1990)
Antoniadis, Ignatios, Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V
Goldstone fermion couplings and supersymmetry breaking in superstring models (1990)
Ellis, Jonathan Richard, Lahanas, Athanasios B, Nanopoulos, Dimitri V
Cosmological string theories and discrete inflation (1990)
Antoniadis, Ignatios, Bachas, C P, Ellis, Jonathan Richard, Nanopoulos, Dimitri V
Aspects of the grand unification of strong, weak and electromagnetic interactions (1990)
Buras, Andrzej J, Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V
QCD predictions for hadronic final states in e$^{+}$e.sup(- annihilation (1990)
De Rújula, Alvaro, Ellis, Jonathan Richard, Floratos, Emmanuel G, Gaillard, Mary Katherin
Non-perturbative QCD effects at large momentum transfers (1990)
Baulieu, L, Ellis, Jonathan Richard, Gaillard, Mary Katherin, Zakrzewski, W J
Baryon number generation in grand unified theories (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V
Is the mass of the Higgs boson about 10 GeV? (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V, Sachrajda, Christopher T C
On the effective Lagrangian for baryon decay (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V
A hierarchy of gauge hierarchies (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Petermann, Andreas, Sachrajda, Christopher T C
Neutrino masses and oscillations in SU(5) (1990)
Barbieri, Riccardo, Ellis, Jonathan Richard, Gaillard, Mary Katherin
The smoothness of the universe (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V
Can one test technicolour? (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V, Sikivie, P
Grand unification, the neutron electric dipole moment and galaxy formation (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V, Rudaz, S
The grand unified axion not observable? (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V, Rudaz, S
Spin-zero leptons and the anomalous magnetic moment of the muon (1990)
Ellis, Jonathan Richard, Hagelin, John S, Nanopoulos, Dimitri V
Baryon number violation catalyzed by grand unified monopoles (1990)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A
Cosmological inflation cries out for supersymmetry (1990)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A, Tamvakis, Kyriakos
More about baryon number violation catalyzed by grand unified monopoles (1990)
Bais, F A, Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A
Grand unification in simple supergravity (1990)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Tamvakis, Kyriakos
Fluctuations in a supersymmetric inflationary universe (1990)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A, Tamvakis, Kyriakos
Primordial supersymmetric inflation (1990)
Ellis, Jonathan Richard, Nanopoulos, Dimitri V, Olive, Keith A, Tamvakis, Kyriakos
Uncertainties in the proton lifetime (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V, Rudaz, S
Inflation can save the gravitino (1990)
Ellis, Jonathan Richard, Linde, Andrei D, Nanopoulos, Dimitri V
Nonperturbative effects on factorization in high-momentum processes (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Zakrzewski, W J
CP violation and supersymmetry (1990)
Ellis, Jonathan Richard, Ferrara, Sergio, Nanopoulos, Dimitri V
A cosmological lower bound on the neutron electric dipole moment (1990)
Ellis, Jonathan Richard, Gaillard, Mary Katherin, Nanopoulos, Dimitri V, Rudaz, S
Can one tell QCD from a hole in the ground?: a drama in five acts (1990)
De Rújula, Alvaro, Ellis, Jonathan Richard, Petronzio, Roberto, Preparata, Giuliano, Scott, W