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22 papers · 2 filters
Supersymmetric Dark Matter and Yukawa Unification
Utpal Chattopadhyay, Achille Corsetti, Pran Nath
An analysis of supersymmetric dark matter under the Yukawa unification constraint is given. The analysis utilizes the recently discovered region of the parameter space of models wi…
Quark number susceptibilities from lattice QCD
Rajiv V. Gavai
Results from our recent investigations of quark number susceptibilities in both quenched and 2-flavour QCD are presented as a function of valence quark mass and temperature. A stro…
Constraints On Radiative Neutrino Mass Models From Oscillation Data
Probir Roy, Sudhir K. Vempati
The three neutrino Zee model and its extension including three active and one sterile species are studied in the light of new neutrino oscillation data. We obtain analytical relati…
Anomalous Neutrino Interaction, Muon g-2, and Atomic Parity Nonconservation
Ernest Ma, D. P. Roy
We propose a simple unified description of two recent precision measurements which suggest new physics beyond the Standard Model of particle interactions, i.e. the deviation of $\s…
Discussion on a possible neutrino detector located in India
M. V. N. Murthy, U. A. Yajnik
We have identified some important and worthwhile physics opportunitites with a possible neutrino detector located in India. Particular emphasis is placed on the geographical advant…
Measuring Cosmic Defect Correlations in Liquid Crystals
Rajarshi Ray, Ajit M. Srivastava
From the theory of topological defect formation proposed for the early universe, the so called Kibble mechanism, it follows that the density correlation functions of defects and an…
Unification, , the Constraint and Nonuniversalities
Utpal Chattopadhyay, Pran Nath
An analysis is given of the Yukawa coupling unification in view of the recent result from Brookhaven on and under the constraint of . We explore unifi…
Linear Collider Signals of Anomaly Mediated Supersymmetry Breaking
Sourov Roy
Diagnostic signals of the minimal model of anomaly mediated supersymmetry breaking are discussed in the context of a = 1 TeV linear collider.
Quark number susceptibilities from lattice QCD
Rajiv V. Gavai
Results from our recent investigations of quark number susceptibilities in both quenched and 2-flavour QCD are presented as a function of valence quark mass and temperature. A stro…
Gauged with Large Muon Anomalous Magnetic Moment and the Bimaximal Mixing of Neutrinos
Ernest Ma, D. P. Roy, Sourov Roy
We consider the gauging of as an explanation of a possibly large muon anomalous magnetic moment. We then show how neutrino masses with bimaximal mixing may be obtained i…
Using Tau Polarization to Sharpen up the SUGRA Signal at Tevatron
Monoranjan Guchait, D. P. Roy
The most promising source of SUGRA signal at the Tevatron collider is the pair-production of electroweak gauginos, followed by their leptonic decay. In the parameter range correspo…
Muon g-2 and Implications for Supersymmetry
Utpal Chattopadhyay, Pran Nath
A brief review is given of the implications of the recent Brookhaven result on the muon anomaly () for supersymmetry. We focus mainly on the implications of the recent results…
Vacuum stability bounds in Anomaly and Gaugino Mediated SUSY breaking models
Emidio Gabrielli, Katri Huitu, Sourov Roy
We constrain the parameter space of the minimal and gaugino-assisted anomaly mediation, and gaugino mediation models by requiring that the electroweak vacuum corresponds to the dee…
Single sneutrino production in collisions
M. Chaichian, K. Huitu, S. Roy +1
We study the single production of sneutrinos with two leptons (or jets) via collision in an R-parity () violating supersymmetric model. The subsequent decays of the sne…
Neutrino Anomalies in Gauge Mediated Model with Trilinear R violation
Anjan S. Joshipura, Rishikesh D. Vaidya, Sudhir K. Vempati
The structure of neutrino masses and mixing resulting from trilinear violating interactions is studied in the presence of the gauge mediated supersymmetry breaking. Neutrino ma…
Global oscillation analysis of solar neutrino data with helioseismically constrained fluxes
Sandhya Choubey, Srubabati Goswami, Kamales Kar +2
A seismic model for the Sun calculated using the accurate helioseismic data predicts a lower neutrino flux as compared to the standard solar model (SSM). However, there p…
Reviving the energy independent suppression of the solar neutrino flux
Sandhya Choubey, Srubabati Goswami, Nayantara Gupta +1
We explore the possibility of an energy independent suppression of the solar neutrino flux in the context of the recent SuperKamiokande data. From a global analysis of the rate and…
Characteristic Wino Signals in a Linear Collider from Anomaly Mediated Supersymmetry Breaking
Dilip Kumar Ghosh, Anirban Kundu, Probir Roy +1
Though the minimal model of anomaly mediated supersymmetry breaking has been significantly constrained by recent experimental and theoretical work, there are still allowed regions…
Supersymmetric lepton flavour violation in a linear collider: the role of charginos
M. Guchait, J. Kalinowski, P. Roy
The occurrence of a significant amount of supersymmetric lepton flavour violation at laboratory energies, through mixing, has become a realistic possibility…
Constraining the Randall-Sundrum Model Using Diphoton Production at Hadron Colliders
K. Sridhar
Virtual effects of gravitons in the production of diphotons at the upgraded Tevatron and at the LHC are analysed with the idea of probing the parameter space of the Randall-Sundrum…
Constraints on Explicit CP Violation from the Brookhaven Muon g-2 Experiment
Tarek Ibrahim, Utpal Chattopadhyay, Pran Nath
We use the recently derived CP phase dependent analytic results for the supersymmetric electro-weak correction to to constrain the explicit CP phases in softly broken super…
Upper Limits on Sparticle Masses from g-2 and the Possibility for Discovery of Supersymmetry at Colliders and in Dark Matter Searches
Utpal Chattopadhyay, Pran Nath
We analyze the implications of the new physics effect seen in the Brookhaven measurement and show that if the effect arises from supersymmetry, then the sign of the Higgs mix…