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research article

On the importance of electroweak corrections for Majorana dark matter indirect detection

Ciafaloni, Paolo
•
Cirelli, Marco
•
Comelli, Denis
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2011
Journal Of Cosmology And Astroparticle Physics

Recent analyses have shown that the inclusion of electroweak corrections can alter significantly the energy spectra of Standard Model particles originated from dark matter annihilations. We investigate the important situation where the radiation of electroweak gauge bosons has a substantial influence: a Majorana dark matter particle annihilating into two light fermions. This process is in p-wave and hence suppressed by the small value of the relative velocity of the annihilating particles. The inclusion of electroweak radiation eludes this suppression and opens up a potentially sizeable s-wave contribution to the annihilation cross section. We study this effect in detail and explore its impact on the fluxes of stable particles resulting from the dark matter annihilations, which are relevant for dark matter indirect searches. We also discuss the effective field theory approach, pointing out that the opening of the s-wave is missed at the level of dimension-six operators and only encoded by higher orders.

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Type
research article
DOI
10.1088/1475-7516/2011/06/018
Web of Science ID

WOS:000292332400018

Author(s)
Ciafaloni, Paolo
Cirelli, Marco
Comelli, Denis
De Simone, Andrea  
Riotto, Antonio
Urbano, Alfredo
Date Issued

2011

Published in
Journal Of Cosmology And Astroparticle Physics
Start page

018

Subjects

dark matter theory

•

cosmology of theories beyond the SM

•

Spiral Galaxies

•

Decay

•

Halos

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPTP  
Available on Infoscience
December 16, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/73888
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