Scalar triplet leptogenesis in the presence of right-handed neutrinos with S3 symmetry

TL;DR

This paper explores scalar triplet leptogenesis within an extended Standard Model incorporating $S_3$ and $Z_2$ symmetries, right-handed neutrinos, and scalar triplets/doublets, analyzing neutrino phenomenology and matter-antimatter asymmetry.

Contribution

It introduces a novel $S_3$ symmetric framework with scalar triplets and right-handed neutrinos for leptogenesis at different energy scales, linking neutrino data with leptogenesis and lepton flavor violation.

Findings

Leptogenesis viable at high and low energy scales.

Model constrains neutrino oscillation data and explains lepton flavor violation.

Addresses muon g-2 anomaly within the $S_3$ symmetric model.

Abstract

Leptogenesis appears to be a viable alternative to account for the baryon asymmetry of the universe through baryogenesis. In this context, we consider a scenario in which the standard model is extended with $S_3$ and $Z_2$ symmetry in addition to the two scalar triplets, two scalar doublets and three right handed neutrinos. Presence of scalar triplets and right-handed neutrinos in the scenarios of both type-I and type-II seesaw framework provide a different leptogenesis option and can help us to understand the matter-antimatter asymmetry with simple $S_3$ symmetry. We discuss the neutrino phenomenology and leptogenesis in both high ($O(10^{10})$ GeV) and low energy scale ($O$(2)TeV) by constraining the Yukawa couplings. Moreover, we also consider the constraints on model parameters from neutrino oscillation data and leptogenesis to explain the rare lepton flavor violating decay and muon g-2 anomaly.