Reheating in two-sector cosmology
Abstract
In this talk I describe scenarios where a hidden sector (HS) is directly populated by post-inflationary reheating along with the Standard Model (SM). Using numerical solutions of the appropriate Boltzmann equations describing perturbative reheating of the two sectors, I describe the role of quantum statistics and inflaton-mediated non-equilibrium energy transfer between the HS and SM in determining the temperature history. The resulting temperature ratio between the two sectors is a function of their couplings to the inflaton, and admits analytical approximations that allows the temperature ratios to be quickly estimated in a wide range of models. Additionally, I discuss how incorporating quantum statistics can lead to novel parametric behavior for radiation baths during perturbative reheating at temperatures large compared to the inflaton mass.
The work of Peter Adshead and Pranjal Ralegankar was supported in part by NASA Astrophysics Theory Grant NNX17AG48G. The work of Jessie Shelton and Pranjal Ralegankar was supported in part by DOE Early Career Grant DE-SC0017840.- Publication:
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APS April Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..APRB11005A