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- W4310632130 abstract "This paper presents a~way to regularize the $t$-channel singularity (which appears when a~massive, stable $t$-channel mediator of a~given process is allowed to be on-shell, making the cross section infinite) in a~general case of particles of any spin (0,~nicefrac12,~1) interacting within a~thermal medium. Those interactions result in a~finite lifetime of the mediator and allow to introduce an~effective momentum- and temperature-dependent width. As a result, the would-be-singular cross section becomes finite. A~complete derivation and an analytical result for the width are provided. For an illustration, the method is used to calculate the thermal widths and cross sections within the~Vector-Fermion Dark Matter model." @default.
- W4310632130 created "2022-12-13" @default.
- W4310632130 creator A5006273442 @default.
- W4310632130 date "2022-12-01" @default.
- W4310632130 modified "2023-10-18" @default.
- W4310632130 title "Thermal regularization of t-channel singularities in cosmology and particle physics: the general case" @default.
- W4310632130 doi "https://doi.org/10.48550/arxiv.2212.00561" @default.
- W4310632130 hasPublicationYear "2022" @default.
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