322 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Tata Institute of Fundamental ResearchIN58 papers
- Aarhus UniversityDK17 papers
- Centre National de la Recherche ScientifiqueFR16 papers
- University of BirminghamGB15 papers
- Yale UniversityUS14 papers
- Observatoire de ParisFR13 papers
- Laboratoire d’études spatiales et d’instrumentation en astrophysiqueFR11 papers
- Universidade do PortoPT11 papers
- The University of SydneyAU10 papers
- Max Planck Institute for Solar System ResearchDE9 papers
- Astrophysique, Instrumentation et ModélisationFR8 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR8 papers
22 papers · 1 filter
A Lower Bound on Inelasticity in Pion-Pion Scattering
André Martin, S. M. Roy
Assuming that the pion-pion scattering amplitude and its absorptive part are analytic inside an ellipse in - plane with foci , and right extremity , ($ε…
SUSY Dark Matter in Universal and Nonuniversal Gaugino Mass Models
D. P. Roy
We review the phenomenology of SUSY dark matter in various versions of MSSM, with universal and nonuniversal gaugino masses at the GUT scale. We start with the universal case (CMSS…
Pomeron pole plus grey disk model: real parts, inelastic cross sections and LHC data
S. M. Roy
I propose a two component analytic formula for scattering at energies ,where $…
Froissart Bound on Inelastic Cross Section Without Unknown Constants
André Martin, S. M. Roy
Assuming that axiomatic local field theory results hold for hadron scattering, André Martin and S. M. Roy recently obtained absolute bounds on the D-wave below threshold for pion-p…
Higgsino Dark Matter in Nonuniversal Gaugino Mass Models
Manimala Chakraborti, Utpal Chattopadhyay, Soumya Rao +1
We study two simple and well motivated nonuniversal gaugino mass models, which predict higgsino dark matter. One can account for the observed dark matter relic density along with t…
Testing SUSY models for the muon g-2 anomaly via Chargino-Neutralino Pair Production at the LHC
Siba Prasad Das, Monoranjan Guchait, D. P. Roy
Non-universal gaugino mass models can naturally account for the dark matter relic density via the bulk annihilation process with relatively light bino LSP and right sleptons in the…
Froissart Bound on Total Cross-section without Unknown Constants
André Martin, S. M. Roy
We determine the scale of the logarithm in the Froissart bound on total cross-sections using absolute bounds on the D-wave below threshold for scattering. E.g. for s…
Reconciling the Muon g-2 and Dark Matter Relic Density with the LHC Results in Nonuniversal Gaugino Mass Models
Subhendra Mohanty, Soumya Rao, D. P. Roy
Relatively light electroweak superparticle masses are required to satisfy the bulk annihilation region of dark matter relic density and account for the observed excess of muon g-2,…
Determination of the Third Neutrino-Mixing Angle θ_(13) and its Implications
D. P. Roy
Till 2010 we had three unknown parameters of neutrino oscillation: the third mixing angle θ_(13), the sign of the larger mass difference Δm^(2)_(31) and the CP violating phase δ. T…
Predictions of a Natural SUSY Dark Matter Model for Direct and Indirect Detection Experiments
Subhendra Mohanty, Soumya Rao, D. P. Roy
The most natural region of cosmologically compatible dark matter relic density in terms of low fine-tuning in a minimal supersymmetric standard model with nonuniversal gaugino mass…
Probing a Mixed Neutralino Dark Matter Model at the 7 TeV LHC
Monoranjan Guchait, D. P. Roy, Dipan Sengupta
We have analyzed the prospect of probing a non-universal gaugino mass model of mixed bino-higgsino dark matter at the current 7 TeV run of LHC. It provides cosmologically compatibl…
An upper bound on the total inelastic cross-section as a function of the total cross-section
Tai Tsun Wu, André Martin, Shasanka Mohan Roy +1
Recently André Martin has proved a rigorous upper bound on the inelastic cross-section at high energy which is one-fourth of the known Froissart-Martin-Lukaszuk upper bo…
Relic density and PAMELA events in a heavy wino dark matter model with Sommerfeld effect
Subhendra Mohanty, Soumya Rao, D. P. Roy
In a wino LSP scenario the annihilation cross section of winos gravitationally bound in galaxies can be boosted by a Sommerfeld enhancement factor which arises due to the ladder of…
Comparing the Predictions of two Mixed Neutralino Dark Matter Models with the Recent CDMS II Candidate Events
D. P. Roy
We consider two optimally mixed neutralino dark matter models, based on nonuniversal gaugino masses, which were recently proposed by us to achieve WMAP compatible relic density ove…
Mixed Neutralino Dark Matter in Nonuniversal Gaugino Mass Models
Utpal Chattopadhyay, Debottam Das, D. P. Roy
We have considered nonuniversal gaugino mass models of supergravity, arising from a mixture of two superfield contributions to the gauge kinetic term, belonging to a singlet and a…
Using Tau Polarization to probe the Stau Co-annihilation Region of mSUGRA Model at LHC
R. M. Godbole, Monoranjan Guchait, D. P. Roy
The mSUGRA model predicts the polarization of the tau coming from the stau to bino decay in the co-annihilation region to be +1. This can be exploited to extract this soft tau sign…
Dictionary of LHC Signatures
A. Belyaev, I. A. Christidi, A. De Roeck +5
We report on a plan to establish a "Dictionary of LHC Signatures", an initiative that started at the WHEPPX workshop in January 2008. This study aims towards the strategy on distin…
Probing a Supersymmetric Model for Neutrino Masses at Ultrahigh Energy Neutrino Telescopes
M. Hirsch, D. P. Roy, J. W. F. Valle
A bilinear R-Parity breaking SUSY model for neutrino mass and mixing predicts the lightest superparticle to decay mainly into a pair of tau leptons or b quarks along with a neutrin…
SUSY Search in Future Collider and Dark Matter Experiments
D. P. Roy
The lightest superparticle in the MSSM is expected to be a Bino, Higgsino or Wino. We consider the dark matter abundance constraint on these LSP scenarios in the minimal SUGRA and…
Natural Dark Matter in SUSY GUTs with Non-universal Gaugino Masses
S. F. King, J. P. Roberts, D. P. Roy
We consider neutralino dark matter within the framework of SUSY GUTs with non-universal gaugino masses. In particular we focus on the case of SU(5) with a SUSY breaking F-term in t…
Looking for a heavy wino LSP in collider and dark matter experiments
Utpal Chattopadhyay, Debottam Das, Partha Konar +1
We investigate the phenomenology of a wino LSP as obtained in AMSB and some string models. The WMAP constraint on the DM relic density implies a wino LSP mass of 2.0-2.3 TeV. We fi…
Signature of heavy Charged Higgs Boson at LHC in the 1 and 3 prong Hadronic Tau Decay channels
Monoranjan Guchait, Ritva Kinnunen, D. P. Roy
We have done a fast simulation analysis of the charged Higgs signal at LHC in the 1 and 3 prong hadronic -jet channels along with the background. The polarization…