26-30 July 2021
Europe/Berlin timezone

DRAKE: Dark matter Relic Abundance beyond Kinetic Equilibrium

28 Jul 2021, 09:30


Parallel session talk Dark Matter T03: Dark Matter


Andrzej Hryczuk (National Centre for Nuclear Research, Poland)


In the usual approach to the determination of the dark matter thermal relic abundance an assumption of local thermal equilibrium is made. In this talk I will discuss how to go beyond this assumption and introduce DRAKE — a numerical precision tool that can trace not only the DM relic density, but also its velocity dispersion and full phase space distribution function. I will review the general motivation for this approach and, for illustration, highlight three concrete classes of models where kinetic and chemical decoupling are intertwined in a way that can impact the value of the relic density by as much as an order of magnitude: i) dark matter annihilation via a narrow resonance, ii) Sommerfeld-enhanced annihilation and iii) `forbidden' annihilation to final states that are kinematically inaccessible at threshold.

Collaboration / Activity Theory
First author Andrzej Hryczuk
Email andrzej.hryczuk@ncbj.gov.pl

Primary authors

Andrzej Hryczuk (National Centre for Nuclear Research, Poland) Tobias Binder (Kavli IPMU) Torsten Bringmann (Oslo University) Michael Gustafsson (Göttingen University)

Presentation Materials