Coloured coannihilations: Dark matter phenomenology meets non-relativistic EFTs - INSPIRE

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Coloured coannihilations: Dark matter phenomenology meets non-relativistic EFTs

S. Biondini
(
- Groningen U.
)
,
Stefan Vogl
(
- Heidelberg, Max Planck Inst.
)

Nov 6, 2018

35 pages

Published in:

JHEP 02 (2019) 016

Published: Feb 4, 2019

e-Print:

1811.02581 [hep-ph]

DOI:

10.1007/JHEP02(2019)016

View in:

ADS Abstract Service

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Abstract: (Springer)

We investigate the phenomenology of a simplified model with a Majorana fermion as dark matter candidate which interacts with Standard Model quarks via a colourcharged coannihilation partner. Recently it has been realized that non-perturbative dynamics, including the Sommerfeld effect, bound state formation/dissociation and thermal corrections, play an important role in coannihilations with coloured mediators. This calls for a careful analysis of thermal freeze-out and a new look at the experimental signatures expected for a thermal relic. We employ a state of the art calculation of the relic density which makes use of a non-relativistic effective theory framework and calculate the effective annihilation rates by solving a plasma-modified Schrödinger equation. We determine the cosmologically preferred parameter space and confront it with current experimental limits and future prospects for dark matter detection.

Note:

Published version, references and section on indirect detection added

Beyond Standard Model
Cosmology of Theories beyond the SM
Effective Field Theories
Thermal Field Theory
new physics
effective field theory: nonrelativistic
fermion: Majorana
fermion: dark matter
dark matter: freeze-out
freeze-out: thermal

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