Leptogenesis in supersymmetry with one $L$ violating coupling

TL;DR

This paper proposes a novel leptogenesis mechanism in supersymmetry using a single $L$ violating coupling and a Majorana phase, differing from traditional models requiring multiple couplings, and operates at the TeV scale.

Contribution

It introduces a new leptogenesis scenario with only one $L$ violating coupling and a Majorana phase in R-parity violating MSSM, compatible with neutrino mass generation.

Findings

Successful leptogenesis at TeV scale.

Compatible with light neutrino mass generation.

Distinct from models requiring multiple $L$ violating couplings.

Abstract

We have shown a new scenario of successful leptogenesis with one $L$ violating coupling and a relative Majorana phase playing the role of $CP$ violation. This is in contrast to the usual consideration of Feynman diagram with at least two $L$ violating couplings. We have considered $R$-parity violating Minimal Supersymmetric Standard Model (MSSM) for leptogenesis at TeV scale. This scenario is also consistent with generating light neutrino mass if asymmetry is generated through semileptonic $\lambda^{\prime}$ coupling.