518 citations · 3.6k across the 129 of their papers we have counts for
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Scalar Neutrino as Asymmetric Dark Matter: Radiative Neutrino Mass and Leptogenesis
Ernest Ma, Utpal Sarkar
In the Minimal Supersymmetric Standard Model (MSSM), the scalar neutrino has odd R parity, yet it has long been eliminated as a dark-matter candidate because it scatter…
Inflationary baryogenesis with low reheating temperature and testable neutron-antineutron oscillation
Pei-Hong Gu, Utpal Sarkar
Recently we extended the standard model by four TeV-scale fields including a singlet fermion, an isotriplet and two isosinglet diquark scalars to generate the cosmological baryon a…
Superluminal neutrinos at the OPERA?
Robert B. Mann, Utpal Sarkar
We argue that the recent measurement of the neutrino velocity to be higher than the velocity of light could be due to violation of Lorentz invariance by the muon neutrinos. This re…
Common origin of baryon asymmetry and proton decay
Pei-Hong Gu, Utpal Sarkar
A successful baryogenesis theory requires a baryon-minus-lepton number violation if it works before the electroweak phase transition. The baryon-minus-lepton number violation could…
Superluminal Neutrinos at OPERA Confront Pion Decay Kinematics
R. Cowsik, S. Nussinov, U. Sarkar
Violation of Lorentz invariance (VLI) has been suggested as an explanation of the superluminal velocities of muon neutrinos reported by OPERA. In this note we show that the amount…
Baryogenesis and neutron-antineutron oscillation at TeV
Pei-Hong Gu, Utpal Sarkar
We propose a TeV extension of the standard model to generate the cosmological baryon asymmetry with an observable neutron-antineutron oscillation. The new fields include a singlet…
Signals of an invisibly decaying Higgs in a scalar dark matter scenario: a study for the Large Hadron Collider
Kirtiman Ghosh, Biswarup Mukhopadhyaya, Utpal Sarkar
We consider the collider phenomenology of a singlet Majoron model with softly broken lepton number. Lepton number is spontaneously broken when the real part of a new singlet scalar…
Electromagnetic leptogenesis at the TeV scale
Debajyoti Choudhury, Namit Mahajan, Sudhanwa Patra +1
We construct an explicit model implementing electromagnetic leptogenesis. In a simple extension of the Standard Model, a discrete symmetry forbids the usual decays of the right-han…