Asymmetric Reheating via Inverse Symmetry Breaking

Aurora Ireland and Seth Koren

Submitted on 23 November 2022


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 Z2-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.


Comment: 5 pages, 3 figures

Subjects: High Energy Physics - Phenomenology; Astrophysics - Cosmology and Nongalactic Astrophysics


Logarithmic differential yield of $N$ (solid) and $N'$ (dashed) as a function of temperature. Parameters fixed as $M_N=10^{14}$ GeV and $\lambda = 4 \times 10^{-5}$; changing either just results in an overall vertical translation.