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Sep 27 – 30, 2016
DESY Hamburg
Europe/Berlin timezone

Relic density at NLO: the IR finiteness

Sep 28, 2016, 3:00 PM
15m
Seminar room 2 (DESY Hamburg)

Seminar room 2

DESY Hamburg

Notkestrasse 85, 22607 Hamburg
Cosmology & Astroparticle Physics Parallel Session: Cosmology & Astroparticle Physics

Speaker

Dr Andrzej Hryczuk (University of Oslo)

Description

In recent years there has been an increasing interest in computations of the dark matter thermal relic density beyond the leading order in perturbation theory. In this talk we point out that the standard calculation, based on solving the Boltzmann equations, at NLO suffers from a temperature-dependent IR divergence. In an example model we show how both soft and collinear temperature-dependent divergences cancel when the collision term is instead computed in the thermal field theory formalism. We also discuss the remaining finite temperature-dependent correction and its interpretation within the EFT framework.

Primary author

Dr Andrzej Hryczuk (University of Oslo)

Presentation materials