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Electroweak bremsstrahlung for wino-like Dark Matter annihilations

Ciafaloni P
•
Comelli D
•
Riotto A
altro
De Simone, Andrea
2012
  • journal article

Periodico
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Abstract
If the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak interactions of the Standard Model, its main annihilation channel is into W+W-, while the annihilation into light fermions is helicity suppressed. As pointed out recently, the radiation of gauge bosons from the initial state of the annihilation lifts the suppression and opens up an s-wave contribution to the cross section. We perform the full tree-level calculation of Dark Matter annihilations, including electroweak bremsstrahlung, in the context of an explicit model corresponding to the supersymmetric wino. We find that the fermion channel can become as important as the di-boson one. This result has significant implications for the predictions of the fluxes of particles originating from Dark Matter annihilations.
DOI
10.1088/1475-7516/2012/06/016
WOS
WOS:000306003500016
Archivio
http://hdl.handle.net/20.500.11767/14524
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84863455864
Diritti
closed access
Scopus© citazioni
24
Data di acquisizione
Jun 7, 2022
Vedi dettagli
Web of Science© citazioni
26
Data di acquisizione
Mar 18, 2024
Visualizzazioni
1
Data di acquisizione
Apr 19, 2024
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