518 citations · 3.6k across the 129 of their papers we have counts for
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Scale of SU(2)_R symmetry breaking and leptogenesis
Ernest Ma, Subir Sarkar, Utpal Sarkar
Models of leptogenesis often invoke the out-of-equilibrium decays of heavy right-handed neutrinos in order to create a baryon asymmetry of the universe through the electroweak phas…
Gravitino constraints on models of neutrino masses and leptogenesis
David Delepine, Utpal Sarkar
In the supersymmetric extensions of the standard model, neutrino masses and leptogenesis requires existence of new particles. We point out that if these particles with lepton numbe…
A See-Saw Model for Atmospheric and Solar Neutrino Oscillations
Ernest Ma, D. P. Roy, Utpal Sarkar
We have constructed an explicit see-saw model containing two singlet neutrinos, one carrying a gauge charge with an intermediate mass scale of GeV alon…
Baryogenesis with Scalar Bilinears
Ernest Ma, Martti Raidal, Utpal Sarkar
We show that if a baryon asymmetry of the universe is generated through the out-of-equilibrium decays of heavy scalar bilinears coupling to two fermions of the minimal standard mod…
CP violation in the mass matrix of heavy neutrinos
Utpal Sarkar, R. Vaidya
We discuss the question of CP-violation in the effective Hamiltonian approach in models of leptogenesis through heavy right handed neutrino decays. We first formulate the problem i…
Baryogenesis through lepton number violation
Utpal Sarkar
The most promising scenarios of baryogenesis seems to be the one through lepton number violation. Lepton number violation through a Majarana mass of the right-handed neutrinos can…