Asymmetric Reheating via Inverse Symmetry Breaking

TL;DR

This paper introduces a simple mechanism for asymmetric reheating during a phase transition, enabling models with degenerate mirror sectors and novel phenomenology involving particle oscillations.

Contribution

It proposes a new module for asymmetric reheating during a $ ext{Z}_2$-breaking phase, facilitating models with degenerate mirror sectors and unique particle oscillation phenomena.

Findings

Enables exactly degenerate mirror sectors

Allows composite particles to oscillate into mirror counterparts

Reinvigorates models with asymmetric reheating

Abstract

Asymmetric reheating is a generic requirement for models of dark sectors with light species, but its implementation is usually in tension with unique phenomenologies otherwise possible in compelling theories containing dark copies of the Standard Model. We present a simple module to implement asymmetric reheating during a $\mathbb{Z}_2$-breaking phase above some critical temperature. This reinvigorates the possibility of an exactly degenerate mirror sector and the striking phenomenology of composite particles oscillating into their mirror counterparts.