Tathagata Ghosh
Texas A&M University
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Publication
Featured researches published by Tathagata Ghosh.
Physical Review D | 2016
Bhaskar Dutta; Yu Gao; Tathagata Ghosh; Ilia Gogoladze; Tianjun Li
We consider the diphoton resonance at the 13 TeV LHC in a consistent model with new scalars and vector-like fermions added to the Standard Model, which can be constructed from orbifold grand unified theories and string models. The gauge coupling unification can be achieved, neutrino masses can be generated radiatively, and the electroweak vacuum stability problem can be solved. To explain the diphoton resonance, we study a spin-0 particle, and discuss various associated final states. We also constrain the couplings and number of the introduced heavy multiplets for the new resonances width at 5 or 40 GeV.
Physical Review D | 2016
Matthew G. Baring; Tathagata Ghosh; Farinaldo S. Queiroz; Kuver Sinha
Dwarf spheroidal galaxies (dSphs) are promising targets for the indirect detection of dark matter through gamma-ray emission due to their proximity, lack of astrophysical backgrounds and high dark matter density. They are often used to place restrictive bounds on the dark matter annihilation cross section. In this paper, we analyze six years of {\it Fermi}-LAT gamma-ray data from 19 dSphs that are satellites of the Milky Way, and derive from a stacked analysis of 15 dSphs, robust 95\% confidence level lower limits on the dark matter lifetime for several decay channels and dark matter masses between
Physical Review D | 2014
Bhaskar Dutta; R. Eusebi; Yu Gao; Tathagata Ghosh; Teruki Kamon
\sim 1
Physical Review D | 2015
Bhaskar Dutta; Tathagata Ghosh; Alfredo Gurrola; Will Johns; Teruki Kamon; Paul Sheldon; Kuver Sinha; Kechen Wang; Sa Wu; 王科臣
GeV and
Physical Review D | 2015
M. Adeel Ajaib; Bhaskar Dutta; Tathagata Ghosh; Ilia Gogoladze; Qaisar Shafi
10
Physical Review D | 2015
Bhaskar Dutta; Yu Gao; Tathagata Ghosh; Louis E. Strigari
TeV. Our findings are based on a bin-by-bin maximum likelihood analysis treating the J-factor as a nuisance parameter using PASS 8 event-class. Our constraints from this ensemble are among the most stringent and solid in the literature, and competitive with existing ones coming from the extragalactic gamma-ray background, galaxy clusters, AMS-02 cosmic ray data, Super-K and ICECUBE neutrino data, while rather insensitive to systematic uncertainties. In particular, among gamma-ray searches, we improve existing limits for dark matter decaying into
Physical Review D | 2017
Alexandre Alves; Tathagata Ghosh; Kuver Sinha
\bar{b}b
Physics Letters B | 2016
M. Dalchenko; Bhaskar Dutta; Yu Gao; Tathagata Ghosh; Teruki Kamon
, (
Physical Review D | 2016
Bhaskar Dutta; Yu Gao; Tathagata Ghosh; Ilia Gogoladze; Tianjun Li; Joel W. Walker
\mu^+\mu^-
Physical Review D | 2017
Bhaskar Dutta; Kebur Fantahun; Ashen Fernando; Tathagata Ghosh; Jason Kumar; Pearl Sandick; Patrick Stengel; Joel W. Walker
) for DM masses below