Smooth Hybrid Inflation and Non-Thermal Type II Leptogenesis

TL;DR

This paper explores a supersymmetric hybrid inflation model where Higgs triplets facilitate inflation and generate the universe's baryon asymmetry through non-thermal leptogenesis, linking neutrino masses to cosmological observations.

Contribution

It introduces a novel inflationary scenario based on a supersymmetric gauge model with triplet leptogenesis, connecting neutrino mass generation to baryon asymmetry.

Findings

Baryon asymmetry can be explained via non-thermal triplet leptogenesis.

Higgs triplets contribute to neutrino masses and inflation dynamics.

The model successfully links neutrino physics with cosmological baryogenesis.

Abstract

We consider a smooth hybrid inflation scenario based on a supersymmetric SU(2)_L x SU(2)_R x U(1)_B-L model. The Higgs triplets involved in the model play a key role in inflation as well as in explaining the observed baryon asymmetry of the universe. We show that the baryon asymmetry can originate via non-thermal triplet leptogenesis from the decay of SU(2)_L triplets, whose tiny vacuum expectation values also provide masses for the light neutrinos.