Journal of High Energy Physics | |
Efficient numerical integration of thermal interaction rates | |
M. Laine1  G. Jackson2  | |
[1] AEC, Institute for Theoretical Physics, University of Bern, Sidlerstrasse 5, CH-3012, Bern, Switzerland;Institute for Nuclear Theory, Box 351550, University of Washington, 98195-1550, Seattle, WA, USA; | |
关键词: Thermal Field Theory; Cosmology of Theories beyond the SM; Quark-Gluon Plasma; | |
DOI : 10.1007/JHEP09(2021)125 | |
来源: Springer | |
【 摘 要 】
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.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO202203048551886ZK.pdf | 866KB | download |