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Freeze-in production of sterile neutrino dark matter in a gauged U(1)‧ model with inverse seesaw

Poddar, Tanmay Kumar; Das, Arindam; Goswami, Srubabati +1 more

We consider a general, anomaly free U(1)‧ extension of the Standard Model (SM) where the neutrino mass is generated at the tree level via the inverse seesaw mechanism. The model contains three right handed neutrinos, three additional singlet fermions, one extra complex scalar and a neutral gauge boson (Z‧). Instead of resorting to a specific U(1) …

A model of light pseudoscalar dark matter

Chakdar, Shreyashi; Ghosh, Dilip Kumar; Hung, P. Q. +2 more

The EW-νR model was constructed in order to provide a seesaw scenario operating at the Electroweak scale Λ

Primordial black holes and gravitational waves in hybrid inflation with chaotic potentials

Ahmed, Waqas; Junaid, M.; Zubair, Umer

We study the formation of primordial black hole (PBH) dark matter and the generation of scalar induced secondary gravitational waves (SIGWs) in a non-supersymmetric model of hybrid inflation with chaotic (polynomial-like) potential, including one-loop radiative corrections. A radiatively corrected version of these models is entirely consistent wit…