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Interplay between improved interaction rates and modified cosmological histories for dark matter

Simone Biondini
(
- Basel U.
)

Sep 1, 2023

34 pages

Published in:

Front.in Phys. 11 (2023) 1285986

Published: Oct 9, 2023

e-Print:

2309.00323 [hep-ph]

DOI:

10.3389/fphy.2023.1285986

View in:

ADS Abstract Service

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Abstract: (Frontiers)

A novel particle has been and still is an intriguing option to explain the strong evidence for dark matter in our universe. To quantitatively predict the dark matter energy density, two main ingredients are needed: interaction rates and an expansion history of the universe. In this work, we explore the interplay between recent progress in the determination of particle production rates and modified cosmological histories. For the freeze-out mechanism, we focus on Sommerfeld and bound-state effects, which boost and make dark matter pair annihilation more efficient. As regards the freeze-in option, we include thermal masses, which enter the decay processes that produce dark matter, and we find that they can suppress or enhance the dark matter yield. We consider a class of modified cosmological histories that induce a faster universe expansion, and we assess their effect in combination with improved particle interaction rates on the dark matter energy density

Note:

32 pages, 8 figures, revised version, references added. Invited contribution for the research topic "New Avenues For Dark Matter Production" in Frontiers Physics, topic editors G. Arcadi, G. Busoni and T. Toma

dark matter
Freeze-out
Freeze-in
Effective Field Theories
Thermal Field Theory
modified cosmologies
dark matter: energy
energy: density
dark matter: yield
mass: thermal

References(121)

Figures(14)

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