518 citations · 3.6k across the 129 of their papers we have counts for
9 papers · 1 filter
Neutrino Phenomenology, Dark Energy and Leptogenesis from pseudo-Nambu-Goldstone Bosons
C. T. Hill, I. Mocioiu, E. A. Paschos +1
We consider a model of dynamical neutrino masses via the see-saw mechanism. Nambu-Goldstone bosons (majorons) arise associated with the formation of the heavy right-handed majorana…
Low-Energy Thermal Leptogenesis in an Extended NMSSM Model
Ernest Ma, Narendra Sahu, Utpal Sarkar
Thermal leptogenesis in the canonical seesaw model in supersymmetry suffers from the incompatibility of a generic lower bound on the mass scale of the lightest right-handed neutrin…
CP violation in neutrino mass matrix
Utpal Sarkar, Santosh K. Singh
We constructed rephasing invariant measures of CP violation with elements of the neutrino mass matrix, in the basis in which the charged lepton mass matrix is diagonal. We discuss…
Leptogenesis and low energy CP phases with two heavy neutrinos
Kaushik Bhattacharya, Narendra Sahu, Utpal Sarkar +1
An attractive explanation for non-zero neutrino masses and small matter antimatter asymmetry of the present Universe lies in "leptogenesis". At present the {\it size} of the lepton…
Anomaly for Model Building
Utpal Sarkar
A simple algorithm to calculate the group theory factor entering in anomalies at four and six dimensions for SU(N) and SO(N) groups in terms of the Casimir invariants of their subg…
Leptogenesis bound on neutrino masses in left-right symmetric models with spontaneous D-parity violation
Narendra Sahu, Utpal Sarkar
We study the baryogenesis via leptogenesis in a class of left-right symmetric models, in which -parity is broken spontaneously. We first discuss the consequence of the spontaneo…