On the effective operators for Dark Matter annihilations

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.


Published in:
Journal Of Cosmology And Astroparticle Physics, 2
Year:
2013
Publisher:
Bristol, Iop Publishing Ltd
ISSN:
1475-7516
Keywords:
Laboratories:




 Record created 2013-04-19, last modified 2018-03-17


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