Right-handed Sneutrino Inflation in SUSY B-L with Inverse Seesaw

TL;DR

This paper presents a supersymmetric B-L extension model where right-handed sneutrinos drive inflation, B-L symmetry is broken during inflation, and neutrino masses are generated via the inverse seesaw mechanism, with B-L restored afterward.

Contribution

It introduces a novel inflationary scenario using right-handed sneutrinos in SUSY B-L models with inverse seesaw, linking inflation to low-scale B-L breaking and neutrino mass generation.

Findings

Right-handed sneutrino can serve as an inflaton at tree level.

B-L symmetry is broken during inflation and restored afterward.

Neutrino masses are generated through inverse seesaw at TeV scale.

Abstract

We propose a scenario for realizing inflation in the framework of supersymmetric B-L extension of the Standard Model. We find that one of the associated right-handed sneutrinos (the superpartner of the Standard Model singlet fermion) can provide a new non-trivial inflationary trajectory at tree level (therefore breaking B-L during inflation). As soon as the inflation ends, the right-handed sneutrino falls into the supersymmetric vacuum, with a vanishing vacuum expectation value, so that B-L symmetry is restored. In this class of models, the B-L gauge symmetry will be radiatively broken at a TeV scale and light neutrino masses are generated through the inverse seesaw mechanism.