Jackson, G.; Laine, M. (2021). Efficient numerical integration of thermal interaction rates. Journal of High Energy Physics, 2021(9), p. 125. Springer 10.1007/JHEP09(2021)125
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Jackson-Laine2021_Article_EfficientNumericalIntegrationO.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (886kB) | Preview |
In many problems in particle cosmology, interaction rates are dominated by 2 ↔ 2 scatterings, or get a substantial contribution from them, given that 1 ↔ 2 and 1 ↔ 3 reactions are phase-space suppressed. We describe an algorithm to represent, regularize, and evaluate a class of thermal 2 ↔ 2 and 1 ↔ 3 interaction rates for general momenta, masses, chemical potentials, and helicity projections. A key ingredient is an automated inclusion of virtual corrections to 1 ↔ 2 scatterings, which eliminate logarithmic and double-logarithmic IR divergences from the real 2 ↔ 2 and 1 ↔ 3 processes. We also review thermal and chemical potential induced contributions that require resummation if plasma particles are ultrarelativistic.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Jackson, Gregory Scott, Laine, Mikko Sakari |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
01 Dec 2021 07:42 |
Last Modified: |
05 Dec 2022 15:54 |
Publisher DOI: |
10.1007/JHEP09(2021)125 |
ArXiv ID: |
2107.07132 |
BORIS DOI: |
10.48350/161348 |
URI: |
https://boris.unibe.ch/id/eprint/161348 |
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