期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2013/02/039
关键词
dark matter theory; cosmology of theories beyond the SM
资金
- Swiss National Science Foundation [200020-138131]
- Marie Curie Early Initial Training Network Fellowship of the European Community's Seventh Framework Programme [PITN-GA-2008-237920-UNILHC]
- ERC [267985]
- Swiss National Science Foundation (SNF) [200020_138131] Funding Source: Swiss National Science Foundation (SNF)
We consider effective operators describing Dark Matter (DM) interactions with Standard Model fermions. In the non-relativistic limit of the DM field, the operators can be organized according to their mass dimension and their velocity behaviour, i.e. whether they describe s- or p-wave annihilations. The analysis is carried out for self-conjugate DM (real scalar or Majorana fermion). In this case, the helicity suppression at work in the annihilation into fermions is lifted by electroweak bremsstrahlung. We construct and study all dimension-8 operators encoding such an effect. These results are of interest in indirect DM searches.
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