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:
-
- Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- 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. doi: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 = {Thu Jul 11 00:00:00 EDT 2019},
month = {Thu Jul 11 00:00:00 EDT 2019}
}
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