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Title: Dark matter production during the thermalization era

Abstract

We revisit the non-thermal dark matter (DM) production during the thermalization and reheating era after inflation. The decay of inflaton produces high-energy particles that are thermalized to complete the reheating of the Universe. Before the thermalization is completed, DM can be produced from a collision between the high-energy particles and/or the ambient plasma. We calculate the DM abundance produced from these processes for the case where the cross section of the DM production is proportional to the $n$-th power of the center of mass energy. We find that the collision between the high-energy particles is almost always dominant for $$n \gtrsim 4$$ while it is subdominant for $$n \lesssim 2$$. The production from the ambient plasma is dominant when $$n \lesssim 3$$ and the reheating temperature is of the order of or larger than the DM mass. The production from a collision between the high-energy particle and the ambient plasma is important for $$n \lesssim 2$$ and the reheating temperature is much lower than the DM mass.

Authors:
 [1];  [2];  [3]
  1. Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
  2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  3. Tufts Univ., Medford, MA (United States). Dept. of Physics and Astronomy and Inst. of Cosmology
Publication Date:
Research Org.:
Institute for Advanced Study, Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1596652
Grant/Contract Number:  
SC0009988
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2019; Journal Issue: 7; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Cosmology of Theories beyond the SM; Quark-Gluon Plasma; Thermal Field Theory

Citation Formats

Harigaya, Keisuke, Mukaida, Kyohei, and Yamada, Masaki. Dark matter production during the thermalization era. United States: N. p., 2019. Web. https://doi.org/10.1007/JHEP07(2019)059.
Harigaya, Keisuke, Mukaida, Kyohei, & Yamada, Masaki. Dark matter production during the thermalization era. United States. https://doi.org/10.1007/JHEP07(2019)059
Harigaya, Keisuke, Mukaida, Kyohei, and Yamada, Masaki. Thu . "Dark matter production during the thermalization era". United States. https://doi.org/10.1007/JHEP07(2019)059. https://www.osti.gov/servlets/purl/1596652.
@article{osti_1596652,
title = {Dark matter production during the thermalization era},
author = {Harigaya, Keisuke and Mukaida, Kyohei and Yamada, Masaki},
abstractNote = {We revisit the non-thermal dark matter (DM) production during the thermalization and reheating era after inflation. The decay of inflaton produces high-energy particles that are thermalized to complete the reheating of the Universe. Before the thermalization is completed, DM can be produced from a collision between the high-energy particles and/or the ambient plasma. We calculate the DM abundance produced from these processes for the case where the cross section of the DM production is proportional to the $n$-th power of the center of mass energy. We find that the collision between the high-energy particles is almost always dominant for $n \gtrsim 4$ while it is subdominant for $n \lesssim 2$. The production from the ambient plasma is dominant when $n \lesssim 3$ and the reheating temperature is of the order of or larger than the DM mass. The production from a collision between the high-energy particle and the ambient plasma is important for $n \lesssim 2$ and the reheating temperature is much lower than the DM mass.},
doi = {10.1007/JHEP07(2019)059},
journal = {Journal of High Energy Physics (Online)},
number = 7,
volume = 2019,
place = {United States},
year = {2019},
month = {7}
}

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