A Finely-Predicted Higgs Boson Mass from A Finely-Tuned Weak Scale (2009)
Hall, Lawrence J., Nomura, Yasunori
If supersymmetry is broken directly to the Standard Model at energies not very far from the unified scale, the Higgs boson mass lies in the range 128-141 GeV. The end points of this range are tightly...
Warped Supersymmetric Unification with Non-Unified Superparticle Spectrum (2009)
We present a new supersymmetric extension of the standard model. The model is constructed in warped space, with a unified bulk symmetry broken by boundary conditions on both the Planck and TeV...
Matter Unification in Warped Supersymmetric SO(10) (2009)
We construct models of warped unification with a bulk SO(10) gauge symmetry and boundary conditions that preserve the SU(4)_C x SU(2)_L x SU(2)_R Pati-Salam gauge group (422). In the dual 4D...
Cosmic Signals from the Hidden Sector (2009)
Mardon, Jeremy, Nomura, Yasunori, Thaler, Jesse
Cosmologically long-lived, composite states arise as natural dark matter candidates in theories with a strongly interacting hidden sector at a scale of 10 - 100 TeV. Light axion-like states, with...
Multiverse Understanding of Cosmological Coincidences (2009)
Bousso, Raphael, Hall, Lawrence J., Nomura, Yasunori
There is a deep cosmological mystery: although dependent on very different underlying physics, the timescales of structure formation, of galaxy cooling (both radiatively and against the CMB), and of...
Dark Matter Signals from Cascade Annihilations (2009)
Mardon, Jeremy, Nomura, Yasunori, Stolarski, Daniel, Thaler, Jesse
A leading interpretation of the electron/positron excesses seen by PAMELA and ATIC is dark matter annihilation in the galactic halo. Depending on the annihilation channel, the electron/positron...
Dark Matter through the Axion Portal (2008)
Nomura, Yasunori, Thaler, Jesse
Motivated by the galactic positron excess seen by PAMELA and ATIC/PPB-BETS, we propose that dark matter is a TeV-scale particle that annihilates into a pseudoscalar "axion." The positron excess and...
A New Approach to mu-Bmu (2008)
Csaki, Csaba, Falkowski, Adam, Nomura, Yasunori, Volansky, Tomer
We present a new approach to the mu-Bmu problem of gauge mediated supersymmetry breaking. Rather than reducing the generically large contribution to Bmu we point out that acceptable electroweak...
Naturally Flavorful Supersymmetry at the LHC (2008)
Nomura, Yasunori, Stolarski, Daniel
The suppression of flavor and CP violation in supersymmetric theories may be due to the mechanism responsible for the structure of the Yukawa couplings. We study model independently the compatibility...
Flavorful supersymmetry (2008)
Weak scale supersymmetry provides elegant solutions to many of the problems of the standard model, but it also generically gives rise to excessive flavor and CP violation. We show that, if the...
Natural Little Hierarchy from Partially Goldstone Twin Higgs (2008)
Chacko, Z., Nomura, Yasunori, Papucci, Michele, Perez, Gilad
Flavorful Supersymmetry from Higher Dimensions (2008)
Nomura, Yasunori, Papucci, Michele, Stolarski, Daniel
We present models of flavorful supersymmetry in higher dimensions. The Higgs fields and the supersymmetry breaking field are localized in the same place in the extra dimension(s). The Yukawa...
Evidence for the Multiverse in the Standard Model and Beyond (2007)
Hall, Lawrence J., Nomura, Yasunori
In any theory it is unnatural if the observed parameters lie very close to special values that determine the existence of complex structures necessary for observers. A naturalness probability, P, is...
Flavorful Supersymmetry (2007)
Nomura, Yasunori, Papucci, Michele, Stolarski, Daniel
Weak scale supersymmetry provides elegant solutions to many of the problems of the standard model, but it also generically gives rise to excessive flavor and CP violation. We show that if the...
A Simple and Realistic Model of Supersymmetry Breaking (2007)
Nomura, Yasunori, Papucci, Michele
We present a simple and realistic model of supersymmetry breaking. In addition to the minimal supersymmetric standard model, we only introduce a hidden sector gauge group SU(5) and three fields X, F...
More Visible Effects of the Hidden Sector (2007)
Murayama, Hitoshi, Nomura, Yasunori, Poland, David
There is a growing appreciation that hidden sector dynamics may affect the supersymmetry breaking parameters in the visible sector (supersymmetric standard model), especially when the dynamics is...
Simple Scheme for Gauge Mediation (2007)
Murayama, Hitoshi, Nomura, Yasunori
We present a simple scheme for constructing models that achieve successful gauge mediation of supersymmetry breaking. In addition to our previous work [1] that proposed drastically simplified models...
Gauge Mediation Simplified (2006)
Murayama, Hitoshi, Nomura, Yasunori
Gauge mediation of supersymmetry breaking is drastically simplified using generic superpotentials without U(1)_R symmetry by allowing metastable vacua.
Predictive Supersymmetry from Criticality (2006)
Nomura, Yasunori, Poland, David
Motivated by the absence of any direct signal of new physics so far, we present a simple supersymmetric model in which the up-type Higgs mass-squared parameter crosses zero at a scale close to the...
Supersymmetry without the Desert (2006)
Nomura, Yasunori, Poland, David
Naturalness of electroweak symmetry breaking in weak scale supersymmetric theories may suggest the absence of the conventional supersymmetric desert. We present a simple, realistic framework for...
Supersymmetry without a Light Higgs Boson (2006)
Barbieri, Riccardo, Hall, Lawrence J., Nomura, Yasunori, Rychkov, Vyacheslav S.
Motivated by the absence, so far, of any direct signal of conventional low-energy supersymmetry, we explore the consequences of making the lightest Higgs boson in supersymmetry relatively heavy, up...
Kitano, Ryuichiro, Nomura, Yasunori
Weak scale supersymmetric theories often suffer from several naturalness problems: the problems of reproducing the correct scale for electroweak symmetry breaking, the correct abundance for dark...
Holographic Grand Unification (2006)
Nomura, Yasunori, Poland, David, Tweedie, Brock
We present a framework for grand unification in which the grand unified symmetry is broken spontaneously by strong gauge dynamics, and yet the physics at the unification scale is described by (weakly...
Supersymmetry, Naturalness, and Signatures at the LHC (2006)
Kitano, Ryuichiro, Nomura, Yasunori
Weak scale supersymmetry is often said to be fine-tuned, especially if the matter content is minimal. This is not true if there is a large A term for the top squarks. We present a systematic study on...
Natural Little Hierarchy from a Partially Goldstone Twin Higgs (2005)
Chacko, Z., Nomura, Yasunori, Papucci, Michele, Perez, Gilad
We construct a simple theory in which the fine-tuning of the standard model is significantly reduced. Radiative corrections to the quadratic part of the scalar potential are constrained to be...
Nomura, Yasunori, Poland, David, Tweedie, Brock
We construct realistic supersymmetric theories in which the correct scale for electroweak symmetry breaking is obtained without significant fine-tuning. We consider two classes of models. In one...
(mu B)-driven Electroweak Symmetry Breaking (2005)
Nomura, Yasunori, Poland, David, Tweedie, Brock
We consider a scenario in which the dominant quartic coupling for the Higgs doublets arises from the F-term potential, rather than the conventional SU(2)_L x U(1)_Y D-term potential, in...
Dark Matter before the LHC in a Natural Supersymmetric Standard Model (2005)
Kitano, Ryuichiro, Nomura, Yasunori
We show that the solid lower bound of about 10^{-44} cm^2 is obtained for the cross section between the supersymmetric dark matter and nucleon in a theory in which the supersymmetric fine-tuning...
A Solution to the Supersymmetric Fine-Tuning Problem within the MSSM (2005)
Kitano, Ryuichiro, Nomura, Yasunori
Weak scale supersymmetry has a generic problem of fine-tuning in reproducing the correct scale for electroweak symmetry breaking. The problem is particularly severe in the minimal supersymmetric...
The Supersymmetric Fine-Tuning Problem and TeV-Scale Exotic Scalars (2005)
Nomura, Yasunori, Tweedie, Brock
A general framework is presented for supersymmetric theories that do not suffer from fine-tuning in electroweak symmetry breaking. Supersymmetry is dynamically broken at a scale \Lambda \approx (10 -...
A Minimally Fine-Tuned Supersymmetric Standard Model (2005)
Chacko, Z., Nomura, Yasunori, Tucker-Smith, David
We construct supersymmetric theories in which the correct scale for electroweak symmetry breaking is obtained without significant fine-tuning. We calculate the fine-tuning parameter for these...
Evolving Dark Energy with w Deviating from -1 (2005)
Hall, Lawrence J., Nomura, Yasunori, Oliver, Steven J.
Theories of evolving quintessence are constructed that generically lead to deviations from the w = -1 prediction of non-evolving dark energy. The small mass scale that governs evolution, m_\phi...
Supersymmetric Unification in Warped Space (2004)
Supersymmetric unification in warped space provides new possibilities for model building. I argue that the picture of warped supersymmetric unification arises naturally through the AdS/CFT...
Relaxing the Upper Bound on the Mass of the Lightest Supersymmetric Higgs Boson (2004)
Birkedal, Andreas, Chacko, Z., Nomura, Yasunori
We present a class of supersymmetric models in which the lightest Higgs-boson mass can be as large as a few hundred GeV (200 - 300 GeV) while the successful MSSM prediction for gauge coupling...
Acceleressence: Dark Energy from a Phase Transition at the Seesaw Scale (2004)
Chacko, Z., Hall, Lawrence J., Nomura, Yasunori
Simple models are constructed for "acceleressence" dark energy: the latent heat of a phase transition occurring in a hidden sector governed by the seesaw mass scale v^2/M_Pl, where v is the...
Warped Supersymmetric Unification with Non-Unified Superparticle Spectrum (2004)
Nomura, Yasunori, Tucker-Smith, David, Tweedie, Brock
We present a new supersymmetric extension of the standard model. The model is constructed in warped space, with a unified bulk symmetry broken by boundary conditions on both the Planck and TeV...
Matter Unification in Warped Supersymmetric SO(10) (2004)
Nomura, Yasunori, Tucker-Smith, David
We construct models of warped unification with a bulk SO(10) gauge symmetry and boundary conditions that preserve the SU(4)_C x SU(2)_L x SU(2)_R Pati-Salam gauge group (422). In the dual 4D...
Holographic Theories of Electroweak Symmetry Breaking without a Higgs Boson (2003)
Burdman, Gustavo, Nomura, Yasunori
Recently, realistic theories of electroweak symmetry breaking have been constructed in which the electroweak symmetry is broken by boundary conditions imposed at a boundary of higher dimensional...
Higgsless Theory of Electroweak Symmetry Breaking from Warped Space (2003)
We study a theory of electroweak symmetry breaking without a Higgs boson, recently suggested by Csaki et al. The theory is formulated in 5D warped space with the gauge bosons and matter fields...
Higgs as a Holographic Pseudo-Goldstone Boson (2003)
Contino, Roberto, Nomura, Yasunori, Pomarol, Alex
The AdS/CFT correspondence allows to relate 4D strongly coupled theories to weakly coupled theories in 5D AdS. We use this correspondence to study a scenario in which the Higgs appears as a composite...
Spectrum of TeV Particles in Warped Supersymmetric Grand Unification (2003)
Nomura, Yasunori, Smith, David R.
In warped supersymmetric grand unification, XY gauge particles appear near the TeV scale along with Kaluza-Klein towers of the standard model gauge fields. In spite of this exotic low-energy physics,...
Explicit Supersymmetry Breaking on Boundaries of Warped Extra Dimensions (2003)
Hall, Lawrence J., Nomura, Yasunori, Okui, Takemichi, Oliver, Steven J.
Explicit supersymmetry breaking is studied in higher dimensional theories by having boundaries respect only a subgroup of the bulk symmetry. If the boundary symmetry is the maximal subgroup allowed...
Grand Unification in Higher Dimensions (2002)
Hall, Lawrence J., Nomura, Yasunori
We have recently proposed an alternative picture for the physics at the scale of gauge coupling unification, where the unified symmetry is realized in higher dimensions but is broken locally by a...
Unification of Higgs and Gauge Fields in Five Dimensions (2002)
Burdman, Gustavo, Nomura, Yasunori
We construct realistic theories in which the Higgs fields arise from extra dimensional components of higher dimensional gauge fields. In particular, we present a minimal 5D SU(3)_C x SU(3)_W model...
Warped Supersymmetric Grand Unification (2002)
Goldberger, Walter D., Nomura, Yasunori, Smith, David R.
We construct a realistic theory of grand unification in AdS_5 truncated by branes, in which the unified gauge symmetry is broken by boundary conditions and the electroweak scale is generated by the...
Radiative Electroweak Symmetry Breaking from a Quasi-Localized Top Quark (2002)
Barbieri, Riccardo, Hall, Lawrence J., Marandella, Guido, Nomura, Yasunori, Okui, Takemichi, Oliver, Steven J., ...
We consider 5D supersymmetric SU(3) x SU(2) x U(1) theories compactified at the TeV scale on S^1/Z_2 with supersymmetry broken by boundary conditions. Localizing the top quark at a boundary of a...
SO(10) and SU(6) Unified Theories on an Elongated Rectangle (2002)
Hall, Lawrence J., Nomura, Yasunori
Maximally supersymmetric SO(10) and SU(6) unified theories are constructed on the orbifold T^2/(Z_2 x Z'_2), with one length scale R_5 taken much larger than the other, R_6. The effective theory...
A Complete Theory of Grand Unification in Five Dimensions (2002)
Hall, Lawrence J., Nomura, Yasunori
A fully realistic unified theory is constructed, with SU(5) gauge symmetry and supersymmetry both broken by boundary conditions in a fifth dimension. Despite the local explicit breaking of SU(5) at a...
R Symmetry and the Mu Problem (2002)
Hall, Lawrence J., Nomura, Yasunori, Pierce, Aaron
A natural origin for the mu and B parameters of weak scale supersymmetric theories is proposed, applicable to any supersymmetry breaking messenger scale between the weak and Planck scales. Although...
Unification of Weak and Hypercharge Interactions at the TeV Scale (2002)
Hall, Lawrence J., Nomura, Yasunori
A realistic SU(3)_C x SU(3)_W unified theory is constructed with a TeV sized extra dimension compactified on the orbifold S_1/Z_2, leaving only the standard model gauge group SU(3)_C x SU(2)_L x...
Gauge Coupling Unification from Unified Theories in Higher Dimensions (2001)
Hall, Lawrence J., Nomura, Yasunori
Higher dimensional grand unified theories, with gauge symmetry breaking by orbifold compactification, possess SU(5) breaking at fixed points, and do not automatically lead to tree-level gauge...
A Constrained Standard Model: Effects of Fayet-Iliopoulos Terms (2001)
Barbieri, Riccardo, Hall, Lawrence J., Nomura, Yasunori
In hep-ph/0011311 the one Higgs doublet standard model was obtained by an orbifold projection of a 5D supersymmetric theory in an essentially unique way, resulting in a prediction for the Higgs mass...
Gauge Mediation Models with Neutralino Dark Matter (2001)
Nomura, Yasunori, Suzuki, Koshiro
We study gauge mediation models of supersymmetry breaking with neutralino LSP. These models are naturally realized by embedding the usual four-dimensional gauge mediation models into a...
Strongly Coupled Grand Unification in Higher Dimensions (2001)
We consider the scenario where all the couplings in the theory are strong at the cut-off scale, in the context of higher dimensional grand unified field theories where the unified gauge symmetry is...
SO(10) Unified Theories in Six Dimensions (2001)
Hall, Lawrence, Nomura, Yasunori, Okui, Takemichi, Smith, David
We construct supersymmetric models of SO(10) unification in which the gauge symmetry is broken by orbifold compactification. We find that using boundary conditions to break the gauge symmetry down to...
Gauge-Higgs Unification in Higher Dimensions (2001)
Hall, Lawrence, Nomura, Yasunori, Smith, David
The electroweak Higgs doublets are identified as components of a vector multiplet in a higher dimensional supersymmetric field theory. We construct a minimal model in 6D where the electroweak $SU(2)...
Wilson Lines and Symmetry Breaking on Orbifolds (2001)
Hall, Lawrence J., Murayama, Hitoshi, Nomura, Yasunori
Gauge symmetry breaking by boundary conditions on a manifold is known to be equivalent to Wilson-line breaking through a background gauge field, and is therefore spontaneous. These equivalent...
Models of Scherk-Schwarz Symmetry Breaking in 5D: Classification and Calculability (2001)
Barbieri, Riccardo, Hall, Lawrence J., Nomura, Yasunori
The form of the most general orbifold breaking of gauge, global and supersymmetries with a single extra dimension is given. In certain theories the Higgs boson mass is ultraviolet finite due to an...
Softly Broken Supersymmetric Desert from Orbifold Compactification (2001)
Barbieri, Riccardo, Hall, Lawrence J., Nomura, Yasunori
A new viewpoint for the gauge hierarchy problem is proposed: compactification at a large scale, 1/R, leads to a low energy effective theory with supersymmetry softly broken at a much lower scale,...
Constrained Standard Model from Extra Dimension (2001)
A five dimensional supersymmetric model is constructed which reduces to the one Higgs-doublet standard model at low energies. The radiative correction to the Higgs potential is finite and calculable,...
GUT Breaking on the Brane (2001)
Nomura, Yasunori, Smith, David, Weiner, Neal
We present a five-dimensional supersymmetric SU(5) theory in which the gauge symmetry is broken maximally (i.e. at the 5D Planck scale M_*) on the same 4D brane where chiral matter is localized....
Gauge Unification in Higher Dimensions (2001)
Hall, Lawrence, Nomura, Yasunori
A complete 5-dimensional SU(5) unified theory is constructed which, on compactification on the orbifold with two different Z_2's (Z_2 and Z_2'), yields the minimal supersymmetric standard model. The...
Finite Radiative Electroweak Symmetry Breaking from the Bulk (2001)
Arkani-Hamed, Nima, Hall, Lawrence, Nomura, Yasunori, Smith, David, Weiner, Neal
A new physical origin for electroweak symmetry breaking is proposed, involving compact spatial dimensions of scale 1/R \approx 1 TeV. The higher dimensional theory is supersymmetric, and hence...
Viable Ultraviolet-Insensitive Supersymmetry Breaking (2000)
Arkani-Hamed, Nima, Kaplan, David E., Murayama, Hitoshi, Nomura, Yasunori
It is known that one can add D-term contributions for U(1)_Y and U(1)_{B-L} to the anomaly-mediated supersymmetry breaking to make the superparticle spectrum phenomenologically viable. We point out...
A Constrained Standard Model from a Compact Extra Dimension (2000)
Barbieri, Riccardo, Hall, Lawrence J., Nomura, Yasunori
A SU(3) \times SU(2) \times U(1) supersymmetric theory is constructed with a TeV sized extra dimension compactified on the orbifold S^1/(Z_2 \times Z_2'). The compactification breaks supersymmetry...
Low-Scale See-Saw Mechanisms for Light Neutrinos (2000)
Borzumati, Francesca, Nomura, Yasunori
Alternatives to the see-saw mechanism are explored in supersymmetric models with three right-handed or sterile neutrinos. Tree-level Yukawa couplings can be drastically suppressed in a natural way to...
Nomura, Yasunori, Yanagida, T.
We propose a new U(1) gauge interaction in the bulk in higher dimensional spacetime, which transmits supersymmetry-breaking effects on the hidden brane to the observable our brane. We find that...
Quintessence Axion Potential Induced by Electroweak Instanton Effects (2000)
Nomura, Yasunori, Watari, T., Yanagida, T.
Recent cosmological observations suggest the presence of small but nonzero cosmological constant $\Lambda_{cos}^4 \simeq (2 \times 10^{-3} eV)^4$. It is an intriguing possibility that such a small...
Natural Effective Supersymmetry (2000)
Hisano, Junji, Kurosawa, Kiichi, Nomura, Yasunori
Much heavier sfermions of the first-two generations than the other superparticles provide a natural explanation for the flavor and CP problems in the supersymmetric standard model (SUSY SM). However,...
Mass Generation for an Ultralight Axion (1999)
Nomura, Yasunori, Watari, T., Yanagida, T.
If a global chiral symmetry is explicitly broken by anomalies in nonabelian gauge theories, a pseudo Nambu-Goldstone boson (axion) associated with a spontaneous breakdown of such a global symmetry...
Decoupling Solution to the Supersymmetric Flavor Problem without Color Instability (1999)
The supersymmetric flavor problem is elegantly solved by the decoupling scenario, where the first-two generation sfermions are much heavier than the third generation ones. However, such a mass...
Cosmological Constants as Messenger between Branes (1999)
Nomura, Yasunori, Yanagida, T.
We present a supersymmetry-breaking scenario in which both the breaking in the hidden sector with no-scale type supergravity and that in the observable sector with gauge mediation are taken into...
A Relation on Gaugino Masses in a Supersymmetric SO(10)_GUT x SO(6)_H Unified Model (1999)
Kurosawa, Kiichi, Nomura, Yasunori, Suzuki, Koshiro
The doublet-triplet splitting problem in supersymmetric grand unified theories is elegantly solved in a supersymmetric SO(10)_GUT x SO(6)_H model. In this model, the gauginos in the supersymmetric...
Grand-Unification Scale Generation through the Anomalous U(1) Breaking (1999)
Kurosawa, Kiichi, Nomura, Yasunori, Yanagida, T.
We discuss the anomalous U(1) gauge symmetry as a mechanism of generating the grand-unification scale. We conclude that unification to a simple group cannot be realized unless some parameters are...
Quark and Lepton Mass Matrices in the SO(10) Grand Unified Theory with Generation Flipping (1999)
Nomura, Yasunori, Sugimoto, Takashi
We investigate the SO(10) grand unified model with generation flipping. The model contains one extra matter multiplet $\psi(10)$ and it mixes with the usual matter multiplets $\psi_i(16)$ when the...
Long-Lived Superheavy Particles in Dynamical Supersymmetry-Breaking Models in Supergravity (1999)
Hamaguchi, K., Nomura, Yasunori, Yanagida, T.
Superheavy particles of masses $\simeq 10^{13}-10^{14} GeV$ with lifetimes $\simeq 10^{10}-10^{22} years$ are very interesting, since their decays may account for the ultra-high energy (UHE) cosmic...
A Gauge-Mediation Model of Dynamical SUSY Breaking with a Wide Range of the Gravitino Mass (1999)
Nomura, Yasunori, Yanagida, T.
We provide a gauge-mediation model of dynamical supersymmetry breaking where the gravitino mass takes a value in a wide range from 0.1 eV to 10 GeV. The lower mass region of order 100 keV or less...
Hisano, J., Kurosawa, Kiichi, Nomura, Yasunori
Considering that the soft SUSY breaking scalar masses come from a vacuum expectation value of the D-term for an external gauge multiplet, the renormalization of the scalar masses is related to the...
Long Lived Superheavy Dark Matter with Discrete Gauge Symmetries (1998)
Hamaguchi, K., Nomura, Yasunori, Yanagida, T.
The recently observed ultra-high energy (UHE) cosmic rays beyond the Greisen-Zatsepin-Kuzmin bound can be explained by the decays of some superheavy $X$ particles forming a part of dark matter in our...
Bi-Maximal Neutrino Mixing in SO(10)_{GUT} (1998)
Nomura, Yasunori, Yanagida, T.
We find a grand unified SO(10) model which accommodates the bi-maximal neutrino mixing for vacuum-oscillation solutions to the atmospheric and the solar neutrino problems. This model maintains the...
Superheavy Dark Matter with Discrete Gauge Symmetries (1998)
Hamaguchi, K., Nomura, Yasunori, Yanagida, T.
We show that there are discrete gauge symmetries protect naturally heavy X particles from decaying into the ordinary light particles in the supersymmetric standard model. This makes the proposal very...
A Gauge Mediation Model of Dynamical Supersymmetry Breaking without Color Instability (1997)
Nomura, Yasunori, Tobe, K., Yanagida, T.
We construct a gauge mediation model of dynamical supersymmetry breaking (DSB) based on a vector-like gauge theory, in which there is a unique color-preserving true vacuum. The DSB scale...
Dimension-six Proton Decays in the Modified Missing Doublet SU(5) Model (1997)
Hisano, J., Nomura, Yasunori, Yanagida, T.
Dimension-five operators for nucleon decays are suppressed in the modified missing doublet (MMD) model in the supersymmetric SU(5) grand unification. We show that nonrenormalizable interactions...
Nomura, Yasunori, Tobe, Kazuhiro
We analyze a direct-transmission model of dynamical SUSY breaking previously proposed. In the model the gravitino mass is naturally smaller than $1~\KEV$, which is required from the standard...