Ghiglieri, J.; Laine, M. (2022). Smooth interpolation between thermal Born and LPM rates. Journal of High Energy Physics, 2022(1) Springer 10.1007/JHEP01(2022)173
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In a weakly coupled ultrarelativistic plasma, 1 + n ↔ 2 + n scatterings, with n ≥ 0, need sometimes to be summed to all orders, in order to determine a leading-order interaction rate. To implement this “LPM resummation”, kinematic approximations are invoked. However, in cosmological settings, where the temperature changes by many orders of magnitude and both small and large momenta may play a role, such approximations are not always justified. We suggest a procedure to smoothly interpolate between LPM-resummed 1 + n ↔ 2 + n and Born-level 1 ↔ 2 results, rendering the outcome applicable to a broader range of masses and momenta. The procedure is illustrated for right-handed neutrino production from a Standard Model plasma, and dilepton production from a QCD plasma.
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: |
Laine, Mikko Sakari |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Binia Marti |
Date Deposited: |
17 Mar 2023 15:33 |
Last Modified: |
17 Mar 2023 23:27 |
Publisher DOI: |
10.1007/JHEP01(2022)173 |
BORIS DOI: |
10.48350/179878 |
URI: |
https://boris.unibe.ch/id/eprint/179878 |
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