26-30 July 2021
Zoom
Europe/Berlin timezone

Cosmological imprints of non-thermalized dark matter

28 Jul 2021, 09:50
20m
Zoom

Zoom

Parallel session talk Dark Matter T03: Dark Matter

Speaker

Jan Heisig (Université catholique de Louvain (UCL))

Description

Non-thermalized dark matter is a cosmologically valid alternative to the paradigm of weakly interacting massive particles. For dark matter belonging to a $Z_2$-odd sector that also contains a thermalized mediator particle, dark-matter production proceeds via both the freeze-in and super-WIMP mechanism. We highlight their interplay and study the evolution of the resulting dark-matter phase-space distributions in detail. Utilizing our implementation into CLASS, we investigate their cosmological imprints on the matter power spectrum, constrained, in particular, by Lyman-alpha forest observations. For the explicit example of a colored t-channel mediator model, we map out the entire cosmologically viable parameter space, cornered by bounds from the LHC, big bang nucleosynthesis, and the matter power spectrum on small scales.

First author Jan Heisig
Collaboration / Activity none
Email jan.heisig@uclouvain.be

Primary author

Jan Heisig (Université catholique de Louvain (UCL))

Co-authors

Laura Lopez-Honorez (Universite Libre de Bruxelles) Deanna C. Hooper (RWTH Aachen, TTK Institute) Quentin Decant (Universit ́e Libre de Bruxelles)

Presentation Materials