Inflation, baryogenesis and gravitino dark matter at ultra low reheat temperatures

TL;DR

This paper explores how a universe with an extremely low reheat temperature, close to nucleosynthesis scales, can still produce matter-antimatter asymmetry and dark matter through R-parity violating interactions within beyond Standard Model physics.

Contribution

It demonstrates that R-parity violating interactions can simultaneously generate baryon asymmetry and explain dark matter longevity at low reheat temperatures.

Findings

R-parity violation can produce baryon asymmetry at low T_R.

Dark matter longevity can be explained by R-parity violation.

Consistent cosmology is achievable at T_R ~ 1-10 MeV.

Abstract

It is quite possible that the reheat temperature of the universe is extremely low close to the scale of Big Bang nucleosynthesis, i.e. $T_{R}\sim 1-10$ MeV. At such low reheat temperatures generating matter anti-matter asymmetry and synthesizing dark matter particles are challenging issues which need to be addressed within a framework of beyond the Standard Model physics. In this paper we point out that a successful cosmology can emerge naturally provided the R-parity violating interactions are responsible for the excess in baryons over anti-baryons and at the same time they can explain the longevity of dark matter with the right abundance.