期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 10, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2011/10/034
关键词
dark matter theory; cosmology of theories beyond the SM
资金
- Swiss National Science Foundation [200021-125237]
- French national research agency ANR [ANR 2010 BLANC 041301]
- ITN network UNILHC
- [CICYT-FEDER-FPA2008-01430]
The cross section for a Majorana Dark Matter particle annihilating into light fermions is helicity suppressed. We show that, if the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak interactions of the Standard Model, the emission of gauge bosons from the initial state lifts the suppression and allows an s-wave annihilation. The resulting energy spectra of stable Standard Model particles are importantly affected. This has an impact on indirect searches for Dark Matter.
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