Baryogenesis via Mesino Oscillations

TL;DR

This paper introduces a novel baryogenesis mechanism at low energy scales, utilizing mesino oscillations and decays with enhanced CP violation, compatible with current experimental constraints.

Contribution

It presents a new baryogenesis model involving mesino oscillations and decays, with a simplified particle framework and viable parameter space.

Findings

Mechanism can generate the observed baryon asymmetry.

Parameter space includes particles with masses between 300 GeV and 10 TeV.

Model remains consistent with experimental constraints.

Abstract

We propose a new mechanism for baryogenesis at the 1-200 MeV scale. Enhancement of CP violation takes place via interference between oscillations and decays of mesinos--bound states of a scalar quark and antiquark and their CP conjugates. We present the mechanism in a simplified model with four new fundamental particles, with masses between 300 GeV and 10 TeV, and show that some of the experimentally allowed parameter space can give the observed baryon-to-entropy ratio.