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Title: Increasing temperature toward the completion of reheating

Abstract

Reheating is a process where the energy density of a dominant component of the universe other than radiation, such as a matter component, is transferred into radiation. It is usually assumed that the temperature of the universe decreases due to cosmic expansion even during the reheating process, in which case the maximal temperature of the universe is much higher than the reheat temperature. We point out that the temperature of the universe during reheating may in fact increase in well-motivated scenarios. We derive the necessary conditions for the temperature to increase during reheating and discuss concrete examples involving a scalar field. Here, we comment on implications for particle physics and cosmology due to an increasing temperature during reheating.

Authors:
 [1];  [1];  [2]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Inst. for Advanced Study, Princeton, NJ (United States)
Publication Date:
Research Org.:
Institute for Advanced Study, Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1737764
Grant/Contract Number:  
SC0009988; SC0019225
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2020; Journal Issue: 11; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Cosmology of theories beyond the SM; particle physics - cosmology connection; physics of the early universe; inflation

Citation Formats

Co, Raymond T., Gonzalez, Eric, and Harigaya, Keisuke. Increasing temperature toward the completion of reheating. United States: N. p., 2020. Web. https://doi.org/10.1088/1475-7516/2020/11/038.
Co, Raymond T., Gonzalez, Eric, & Harigaya, Keisuke. Increasing temperature toward the completion of reheating. United States. https://doi.org/10.1088/1475-7516/2020/11/038
Co, Raymond T., Gonzalez, Eric, and Harigaya, Keisuke. Thu . "Increasing temperature toward the completion of reheating". United States. https://doi.org/10.1088/1475-7516/2020/11/038. https://www.osti.gov/servlets/purl/1737764.
@article{osti_1737764,
title = {Increasing temperature toward the completion of reheating},
author = {Co, Raymond T. and Gonzalez, Eric and Harigaya, Keisuke},
abstractNote = {Reheating is a process where the energy density of a dominant component of the universe other than radiation, such as a matter component, is transferred into radiation. It is usually assumed that the temperature of the universe decreases due to cosmic expansion even during the reheating process, in which case the maximal temperature of the universe is much higher than the reheat temperature. We point out that the temperature of the universe during reheating may in fact increase in well-motivated scenarios. We derive the necessary conditions for the temperature to increase during reheating and discuss concrete examples involving a scalar field. Here, we comment on implications for particle physics and cosmology due to an increasing temperature during reheating.},
doi = {10.1088/1475-7516/2020/11/038},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 11,
volume = 2020,
place = {United States},
year = {2020},
month = {11}
}

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