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arXiv · 1201.1443

Electroweak lights from Dark Matter annihilations

Andrea De Simone
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Abstract

The energy spectra of Standard Model particles originated from Dark Matter annihilations can be significantly altered by the inclusion of electroweak gauge boson radiation from the final state. A situation where this effect is particularly important is when a Majorana Dark Matter particle annihilates 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. I will discuss the impact of this effect on the fluxes of stable particles resulting from the Dark Matter annihilations, which are relevant for Dark Matter indirect searches.

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Andrea De Simone. 2012-01-06. Electroweak lights from Dark Matter annihilations. https://doi.org/10.1088/1742-6596/375/1/012046

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