Klose, P.; Laine, M.; Procacci, S. (2022). Gravitational wave background from non-Abelian reheating after axion-like inflation. Journal of cosmology and astroparticle physics, 2022(05), 021. Institute of Physics Publishing IOP 10.1088/1475-7516/2022/05/021
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A pseudoscalar inflaton φ, coupled to the topological charge density Ftilde F of a non-Abelian sector, can decay to gauge bosons (φ ⟶ gg), which may thermalize rapidly. The friction felt by φ is then increased by non-Abelian "strong sphalerons", leading to a self-amplifying process that can efficiently heat up the medium. We determine a lower bound for the gravitational wave production rate from such a process, originating via hydrodynamic fluctuations and particle collisions, in terms of a minimal number of parameters. Only a moderate fraction of energy density is converted to gravitational waves, suggesting that non-Abelian models may avoid the overproduction observed in some Abelian cases.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Institute of Theoretical Physics 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Klose, Philipp Mauritz, Laine, Mikko Sakari, Procacci, Simona |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1475-7516 |
Publisher: |
Institute of Physics Publishing IOP |
Language: |
English |
Submitter: |
Binia Marti |
Date Deposited: |
17 Mar 2023 14:49 |
Last Modified: |
19 Mar 2023 02:14 |
Publisher DOI: |
10.1088/1475-7516/2022/05/021 |
BORIS DOI: |
10.48350/179877 |
URI: |
https://boris.unibe.ch/id/eprint/179877 |
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