Neutrino Mass Hierarchy and neutron-anti-neutron Oscillation from Baryogenesis (2008)
Babu, K. S., Dev, P. S. Bhupal, Mohapatra, R. N.
It has been recently proposed that the matter-antimatter asymmetry of the universe may have its origin in "post-sphaleron baryogenesis" (PSB). It is a TeV scale mechanism that is testable at the LHC...
DUSEL Theory White Paper (2008)
Raby, S., Walker, T., Babu, K. S., Baer, H., Balantekin, A. B., Barger, V., ...
The NSF has chosen the site for the Deep Underground Science and Engineering Laboratory (DUSEL) to be in Lead, South Dakota. In fact, the state of South Dakota has already stepped up to the plate and...
Higgs Boson Mass, Sparticle Spectrum and Little Hierarchy Problem in Extended MSSM (2008)
Babu, K. S., Gogoladze, Ilia, Rehman, Mansoor Ur, Shafi, Qaisar
We investigate the impact of TeV-scale matter belonging to complete vectorlike multiplets of unified groups on the lightest Higgs boson in the MSSM. We find that consistent with perturbative...
Minimal Supersymmetric Left-Right Model with Automatic R Parity (2008)
Babu, K. S., Mohapatra, Rabindra N.
We revisit the minimal supersymmetric left-right model with B-L=2 triplet Higgs fields and show that a self-consistent picture emerges with automatic R-parity conservation even in the absence of...
Morjaria, J.B., Chauhan, A.J., Babu, K.S., Polosa, R., Davies, D.E., Holgate, S.T.
Rationale: TNF-alpha is a cytokine recognized as a therapeutic target in chronic inflammatory diseases. Objectives and METHODS: We report a randomised double-blind placebo-controlled parallel group...
Theory of neutrinos: a white paper (2007)
Mohapatra, R.N., Antusch, S., Babu, K.S., Barenboim, G., De Gouvea, A., ...
This paper is a review of the present status of neutrino mass physics, which grew out of an APS sponsored study of neutrinos in 2004. After a discussion of the present knowledge of neutrino masses...
Family Unification with SO(10) (2007)
Babu, K. S., Barr, S. M., Gogoladze, Ilia
Unification based on the group SO(10)^3 \times S_3 is studied. Each family has its own SO(10) group, and the S_3 permutes the three families and SO(10) factors. This is the maximal local symmetry for...
Leptonic color models from Z_8 orbifolded AdS/CFT (2007)
Babu, K. S., Kephart, Thomas W., Päs, Heinrich
We study orbifold compactifications of the type IIB superstring on AdS_5 x S^5/Gamma, where Gamma is the abelian group Z_8, which can lead to non-SUSY three and four family models based on...
Singlet fermion dark matter and electroweak baryogenesis with radiative neutrino mass (2007)
The model of radiative neutrino mass with dark matter proposed by one of us is extended to include a real singlet scalar field. There are then two important new consequences. One is the realistic...
Predictive Model of Inverted Neutrino Mass Hierarchy and Resonant Leptogenesis (2007)
Babu, K. S., Bachri, Abdel G., Tavartkiladze, Zurab
We present a new realization of inverted neutrino mass hierarchy based on $S_3 \times {\cal U}(1)$ flavor symmetry. In this scenario, the deviation of the solar oscillation angle from $\pi/4$ is...
Theory of neutrinos: a white paper (2007)
Mohapatra, R. N., Antusch, S., Babu, K. S., Barenboim, G., Chen, M. C., De Gouvea, A., ...
Theory of neutrinos: a white paper (2007)
Mohapatra, R.N., Antusch, S., Babu, K.S., Barenboim, G., Chen, M.C., De Gouvea, A., ...
This paper is a review of the present status of neutrino mass physics, which grew out of an APS sponsored study of neutrinos in 2004. After a discussion of the present knowledge of neutrino masses...
Unified TeV Scale Picture of Baryogenesis and Dark Matter (2006)
Babu, K. S., Mohapatra, R. N., Nasri, S.
We present a simple extension of MSSM which provides a unified picture of cosmological baryon asymmetry and dark matter. Our model introduces a gauge singlet field $N$ and a color triplet field $X$...
Missing Partner Mechanism in SO(10) Grand Unification (2006)
Babu, K. S., Gogoladze, I., Tavartkiladze, Z.
We present a new possibility for achieving doublet-triplet splitting naturally in supersymmetric SO(10) grand unified theories. It is based on a missing partner mechanism which is realized with the...
Fermion Mass Generation in SO(10) with a Unified Higgs Sector (2006)
Babu, K. S., Gogoladze, Ilia, Nath, Pran, Syed, Raza M.
An analysis of generating fermion masses via cubic couplings in SO(10) grand unification with a unified Higgs sector is given. The new framework utilizes a single pair of vector--spinor...
Post--Sphaleron Baryogenesis (2006)
Babu, K. S., Mohapatra, R. N., Nasri, S.
We present a new mechanism for generating the baryon asymmetry of the universe directly in the decay of a singlet scalar field $S_r$ with a weak scale mass and a high dimensional baryon number...
Anomaly Mediated Supersymmetry Breaking And Nonstandard Neutrino Oscillations (2006)
Scope and method of study. In this thesis, we propose four different scenarios that solves the tachyonic slepton mass problem of Anomaly Mediated Supersymmetry Breaking (AMSB). We also address the...
SU(2) Family Symmetry and the Supersymmetric Spectrum (2005)
Anoka, O. C., Babu, K. S., Gogoladze, I.
We present a supersymmetric extension of the Standard Model with a gauged SU(2) family symmetry for the leptons. It is shown that this family symmetry can be consistently broken at the TeV scale...
Leptogenesis in Minimal Left-Right Symmetric Models (2005)
Babu, K. S., Bachri, A., Aissaoui, H.
We analyze lepton asymmetry induced in the decay of right--handed neutrinos in a class of minimal left--right symmetric models. In these models, which assume low energy supersymmetry, the Dirac...
Theory of Neutrinos: A White Paper (2005)
Mohapatra, Rabindra N, Antusch, S, Babu, K S, Barenboim, G, Chen, M C, Davidson, Sacha, ...
During 2004, four divisions of the American Physical Society commissioned a study of neutrino physics to take stock of where the field is at the moment and where it is going in the near and far...
Theory of Neutrinos: A White Paper (2005)
Mohapatra, R. N., Antusch, S., Babu, K. S., Barenboim, G., Davidson, S., ...
During 2004, four divisions of the American Physical Society commissioned a study of neutrino physics to take stock of where the field is at the moment and where it is going in the near and far...
Physics at a Fermilab Proton Driver (2005)
Albrow, M. G., Antusch, S., Babu, K. S., Barnes, T., Bazarko, A. O., Bernstein, R. H., ...
This report documents the physics case for building a 2 MW, 8 GeV superconducting linac proton driver at Fermilab.
Leptogenesis in Minimal Left-Right Symmetric Models (2005)
Babu, K. S., Bachri, A., Aissaoui, H.
We analyze lepton asymmetry induced in the decay of right--handed neutrinos in a class of minimal left--right symmetric models. In these models, which assume low energy supersymmetry, the Dirac...
Model of Geometric Neutrino Mixing (2005)
Current neutrino oscillation data from solar, atmospheric, and reactor experiments are consistent with the neutrino mixing matrix elements taking values sin^2\theta_{12} = 1/3, sin^2\theta_{23} =...
A Unified Framework for Symmetry Breaking in SO(10) (2005)
Babu, K. S., Gogoladze, Ilia, Nath, Pran, Syed, Raza M.
A new SO(10) unified model is proposed based on a one step breaking of SO(10) to the Standard Model gauge group $SU(3)\times SU(2)\times U(1)_Y$ using a single 144 of Higgs. The symmetry breaking...
Neutrino Masses and Mixings in a Minimal SO(10) Model (2005)
We consider a minimal formulation of SO(10) Grand Unified Theory wherein all the fermion masses arise from Yukawa couplings involving one 126 and one 10 of Higgs multiplets. It has recently been...
Dihedral families of quarks, leptons, and Higgs bosons (2005)
We consider finite groups of small order for family symmetry. It is found that the binary dihedral group Q6, along with the assumption that the Higgs sector is of type II, predicts mass matrix of a...
Lepton Flavor Violation within a realistic SO(10)/G(224) Framework (2005)
Babu, K. S., Pati, Jogesh C., Rastogi, Parul
Lepton flavor violation (LFV) is studied within a realistic unified framework, based on supersymmetric SO(10) or an effective G(224) = SU(2)_L\times SU(2)_R\times SU(4)^c symmetry, that successfully...
Split Supersymmetry from Anomalous U(1) (2005)
Babu, K. S., Enkhbat, Ts., Mukhopadhyaya, Biswarup
We present a scenario wherein the anomalous U(1) D-term of string origin triggers supersymmetry breaking and generates naturally a Split Supersymmetry spectrum. When the gaugino and the Higgsino...
Howarth, P.H., Babu, K.S., Arshad, H.S., Lau, L., Buckley, M., McConnell, W., ...
Background: Tumour necrosis factor {alpha} (TNF{alpha}) is a major therapeutic target in a range of chronic inflammatory disorders characterised by a Th1 type immune response in which TNF{alpha} is...
Leptogenesis in Minimal Left-Right Symmetric Models (2005)
Babu, K. S., Bachri, A., Aissaoui, H.
We analyze lepton asymmetry induced in the decay of right--handed neutrinos in a class of minimal left--right symmetric models. In these models, which assume low energy supersymmetry, the Dirac...
Leptogenesis in Minimal Left-Right Symmetric Models (2005)
Babu, K. S., Bachri, A., Aissaoui, H.
We analyze lepton asymmetry induced in the decay of right--handed neutrinos in a class of minimal left--right symmetric models. In these models, which assume low energy supersymmetry, the Dirac...
Mohapatra, R. N., Antusch, S., Babu, K. S., Barenboim, G., Chen, Mu-Chun, Davidson, S., ...
After a brief overview of the present knowledge of neutrino masses and mixing, we summarize what can be learned about physics beyond the standard model from the various proposed neutrino experiments....
Dihedral Families of Quarks, Leptons and Higgs Bosons (2004)
We consider finite groups of small order for family symmetry. It is found that the binary dihedral group Q_6, along with the assumption that the Higgs sector is of type II, predicts mass matrix of a...
Tying in CP and Flavor Violations with Fermion Masses and Neutrino Oscillations (2004)
Babu, K. S., Pati, Jogesh C., Rastogi, Parul
In this paper we explore the possibility that (a) fermion masses, (b) neutrino oscillations, (c) CP non-conservation and (d) flavor violations get intimately linked to each other within...
Perturbative Unification and Higgs Boson Mass Bounds (2004)
Babu, K. S., Gogoladze, Ilia, Kolda, Christopher
Supersymmetric extensions of the Standard Model generally give a theoretical upper limit on the lightest Higgs boson mass which may be uncomfortably close to the current experimental lower bound of...
Fermion Mass Hierarchy and Electric Dipole Moments (2004)
We show that in supersymmetric models with a gauged flavor symmetry explaining the hierarchy of fermion masses and mixings, the electron, muon, neutron and the deuteron acquire sizable electric...
Chiral Gauge Models for Light Sterile Neutrinos (2004)
We construct a family of simple gauge models in which three sterile neutrinos become naturally light by virtue of a generalized seesaw mechanism involving a chiral gauge symmetry. Examples where the...
Constraining Z' From Supersymmetry Breaking (2004)
Anoka, O. C., Babu, K. S., Gogoladze, I.
We suggest and analyze a class of supersymmetric Z' models based on the gauge symmetry U(1)_x = x Y - (B-L), where Y is the Standard Model hypercharge. For 1 < x < 2, the U(1)_x D-term generates...
Mohapatra, R.N., Antusch, S., Babu, K.S., Barenboim, G., Chen, Mu-Chen, Joshipura, A., ...
After a brief overview of the present knowledge of neutrino masses and mixing, we summarize what can be learned about physics beyond the standard model from the various proposed neutrino experiments....
Simple Model for (3+2) Neutrino Oscillations (2003)
We formulate a set of naturalness criteria for sterile neutrinos (\nu') to be light, needed for reconciling the LSND neutrino anomaly with the other neutrino data. A light sterile neutrino becomes as...
TeV-Scale Horizontal Symmetry and the Slepton Mass Problem of Anomaly Mediation (2003)
Anoka, O. C., Babu, K. S., Gogoladze, I.
We propose a new scenario for solving the tachyonic slepton mass problem of anomaly mediated supersymmetry breaking models with a non-Abelian horizontal gauge symmetry broken at the TeV scale. A...
CP violation in polarized $b \to d l^+ l^-$: A Detailed Standard Model Analysis (2003)
Babu, K. S., Balaji, K. R. S., Schienbein, I.
The electroweak CP violating rate asymmetries in the decay $b \to d l^+ l^-$ are reexamined in detail and updated. In particular, the rate asymmetries are studied when one of the final state leptons...
Anomalous U(1) symmetry and lepton flavor violation (2003)
Babu, K. S., Enkhbat, Ts., Gogoladze, I.
We show that in a large class of models based on anomalous U(1) symmetry which addresses the fermion mass hierarchy problem, leptonic flavor changing processes are induced that are in the...
Quark-Lepton Quartification (2003)
Babu, K. S., Ma, Ernest, Willenbrock, S.
We propose that quarks and leptons are interchangeable entities in the high-energy limit. This naturally results in the extension of [SU(3)]^3 trinification to [SU(3)]^4 quartification. In addition...
Inhaled synthetic surfactant abolishes the early allergen-induced response in asthma (2003)
Babu, K.S., Woodcock, D.A., Smith, S.E., Staniforth, J.N., Holgate, S.T., Conway, J.H.
Allergen-induced inhibition of pulmonary surfactant in asthma may promote airway oedema and consequently potentiate the severity of the asthmatic response. A randomised, single-blind, cross-over...
Gauged Baryon Parity and Nucleon Stability (2003)
Babu, K. S., Gogoladze, Ilia, Wang, Kai
We show that the Standard Model Lagrangian, including small neutrino masses, has an anomaly-free discrete Z_6 symmetry. This symmetry can emerge naturally from I^{3}_{R}+L_i+L_j-2L_k gauge symmetry...
Standard Model CP violation in Polarised b->d l^+ l^- (2003)
Babu, K. S., Balaji, K. R. S., Schienbein, I.
In the standard model, we study CP violating rate asymmetries in the decay b->d l^+ l^- when one of the leptons is polarised. We find an asymmetry of (5 -- 15)% in the polarised decay spectrum which...
Modeling of sediment transport along Mangalore coast using mike 21 (2003)
Babu, K.S., Dwarakish, G.S., Jayakumar, S.
The objective of the present study is to understand the sediment transport along Mangalore Coast and to quantify the sediment transport rates. The data used in the present study includes Wave, Wind,...
Stabilizing the Axion by Discrete Gauge Symmetries (2002)
Babu, K. S., Gogoladze, Ilia, Wang, Kai
The axion solution to the strong CP problem makes use of a global Peccei-Quinn U(1) symmetry which is susceptible to violations from quantum gravitational effects. We show how discrete gauge...
Finite Theories and the SUSY Flavor Problem (2002)
Babu, K. S., Kobayashi, Tatsuo, Kubo, Jisuke
We study a finite SU(5) grand unified model based on the non-Abelian discrete symmetry A_4. This model leads to the democratic structure of the mass matrices for the quarks and leptons. In the soft...
Natural R-Parity, \mu-term, and Fermion Mass Hierarchy From Discrete Gauge Symmetries (2002)
Babu, K. S., Gogoladze, Ilia, Wang, Kai
In the minimal supersymmetric Standard Model with seesaw neutrino masses we show how R-parity can emerge naturally as a discrete gauge symmetry. The same discrete symmetry explains the smallness of...
Two-loop Neutrino Mass Generation and its Experimental Consequences (2002)
If neutrino masses have a radiative origin, their smallness can be naturally understood even when lepton number violation occurs near the weak scale. We analyze a specific model of this type wherein...
Lepton Flavor Violation and the Origin of the Seesaw Mechanism (2002)
Babu, K. S., Dutta, B., Mohapatra, R. N.
The right--handed neutrino mass matrix that is central to the understanding of small neutrino masses via the seesaw mechanism can arise either (i) from renormalizable operators or (ii) from...
Radiative processes (tau -> mu gamma, mu -> e gamma and muon g-2) as probes of ESSM/SO(10) (2002)
The Extended Supersymmetric Standard Model (ESSM), motivated on several grounds, introduces two vectorlike families (16 + 16-bar) of SO(10)) with masses of order one TeV. It is noted that the...
Underlying A_4 Symmetry for the Neutrino Mass Matrix and the Quark Mixing Matrix (2002)
Babu, K. S., Ma, Ernest, Valle, J. W. F.
The discrete non-Abelian symmetry $A_4$, valid at some high-energy scale, naturally leads to degenerate neutrino masses, without spoiling the hierarchy of charged-lepton masses. Realistic neutrino...
Higgs-Mediated tau -> 3 mu in the Supersymmetric Seesaw Model (2002)
Babu, K. S., Kolda, Christopher
Recent observations of neutrino oscillations imply non-zero neutrino masses and flavor violation in the lepton sector, most economically explained by the seesaw mechanism. Within the context of...
Finite Grand Unified Theories and the Quark Mixing Matrix (2002)
Babu, K. S., Enkhbat, Ts., Gogoladze, I.
In N = 1 super Yang-Mills theories, under certain conditions satisfied by the spectrum and the Yukawa couplings, the beta functions will vanish to all orders in perturbation theory. We address the...
Lepton number violating muon decay and the LSND neutrino anomaly (2002)
We show that lepton number violating muon decays, \mu^+ -> e^+ + \nu_e-bar + \nu_i-bar (i=e, \mu or \tau), can consistently explain the neutrino anomaly reported by the LSND experiment. Two effective...
The Extended Supersymmetric Standard Model (ESSM), motivated on several grounds, introduces two vector-like families [16+ 16-bar of SO(10)] with masses of order one TeV. In an earlier work, a...
Family Unification in Five and Six Dimensions (2002)
Babu, K. S., Barr, S. M., Kyae, Bumseok
In family unification models, all three families of quarks and leptons are grouped together into an irreducible representation of a simple gauge group, thus unifying the Standard Model gauge...
Predictive Schemes for Bimaximal Neutrino Mixings (2002)
We present simple and predictive scenarios for neutrino masses which lead to a bimaximal pattern of mixings that apparently provides the best fit to the current solar and atmospheric neutrino data....
Eliminating the d=5 proton decay operators from SUSY GUTs (2002)
A general analysis is made of the question whether the d=5 proton decay operators coming from exchange of colored Higgsinos can be completely eliminated in a natural way in supersymmetric grand...
Management of Cutaneous Drug Reactions (2002)
Drugs are potent chemicals that often have effects in the body beyond the desired action. These effects may range from mild and expected side effects to dramatic and life-threatening anaphylaxis....
Newer therapies for asthma: a focus on anti-IgE (2002)
The prevalence of asthma and other allergic disorders has been on the increase not only in the western world but also in the developing countries. This increasing prevalence has lead research into...
The role of anti-IgE therapies in the treatment of asthma (2002)
The prevalence of asthma, a chronic inflammatory disease often linked to allergy, is on the increase. The introduction of a blocking anti-IgE monoclonal antibody (omalizumab) as a new therapy has not...
Bimaximal Neutrino Mixings from Lopsided Mass Matrices (2001)
Current solar and atmospheric neutrino oscillation data seem to favor a bimaximal pattern for neutrino mixings where the matrix elements U_{e2} and U_{\mu 3} are of order one, while U_{e3} is much...
L_e + L_\mu - L_\tau - L_s Symmetry and a Mixed 2+2 Scenario for Neutrino Oscillations (2001)
Recent results from SuperKamiokande and SNO experiments have set severe constraints on possible mixings of a light sterile neutrino, \nu_s, with the three active species required for a simultaneous...
Observable Neutron-Antineutron Oscillations in Seesaw Models of Neutrino Mass (2001)
We show that in a large class of supersymmetric models with spontaneously broken B-L symmetry, neutron--antineutron oscillations occur at an observable level even though the scale of B-L breaking is...
Solving the Strong CP and the SUSY Phase Problems with Parity Symmetry (2001)
Babu, K. S., Dutta, B., Mohapatra, R. N.
We propose a simultaneous solution to the strong CP problem and the SUSY phase problem based on parity symmetry realized when the supersymmetric standard model is embedded into a left-right symmetric...
Classification of Effective Neutrino Mass Operators (2001)
We present a classification of SU(3) x SU(2) x U(1) gauge invariant \Delta L = 2 (L being lepton number) effective operators relevant for generating small Majorana neutrino masses. Operators of...
Solving the mu problem in gauge mediated supersymmetry breaking models with flavor symmetry (2001)
We suggest a solution to the \mu problem of gauge mediated supersymmtery breaking models based on flavor symmetries. In this scenario the \mu term arises through the vacuum expectation value of a...
The scaling of lepton dipole moments with lepton mass (2000)
Babu, K. S., Barr, S. M., Dorsner, Ilja
The dipole moments of the leptons and quarks are matrices in flavor space, which can potentially reveal as much about the flavor structure of the theory as do the mass matrices. The off-diagonal...
Natural Mass Generation for the Sterile Neutrino (2000)
We point out that there is a serious cosmological problem in the supersymmetric standard model if a sterile neutrino is responsible for the solar neutrino oscillation, and propose a possible solution...
Enhanced electric dipole moment of the muon in the presence of large neutrino mixing (2000)
Babu, K. S., Dutta, B., Mohapatra, R. N.
The electric dipole moment of the muon (d_mu) is evaluated in supersymmetric models with nonzero neutrino masses and large neutrino mixing arising from the seesaw mechanism. It is found that if the...
A mass relation for neutrinos (2000)
A generalization of the well-known Georgi-Jarlskog relation m_{\mu}/m_{\tau} = 3 (m_s/m_b) to neutrinos is found in the context of SO(10). This new relation is m_{\nu_\mu}/m_{\nu_\tau} = 16...
Potential and novel therapies for asthma (2000)
Asthma is a chronic inflammatory disorder characterised by airflow obstruction. The inflammatory process involves mast cells, antigen presenting cells, eosinophils, neutrophils, airway epithelial...
In this letter we demonstrate a new source for large flavor--changing neutral currents within the minimal supersymmetric standard model. At moderate to large tan fi, it is no longer possible to...
Higgs-Mediated $B^0 -> \mu^+ \mu^-$ in Minimal Supersymmetry (1999)
Babu, K. S., Kolda, Christopher
In this letter we demonstrate a new source for large flavor-changing neutral currents within the minimal supersymmetric standard model. At