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WIMP capture by the Sun in the effective theory of dark matter self-interactions

Riccardo Catena (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Axel Widmark (Institutionen för fysik (Chalmers))
(2016)
[Preprint]

We study the capture of WIMP dark matter by the Sun in the non-relativistic effective theory of dark matter self-interactions. The aim is to assess the impact of self- interactions on the expected neutrino flux from the annihilation of WIMPs trapped in the Sun in a model independent manner. We consider all non-relativistic Galilean invariant self- interaction operators that can arise from the exchange of a heavy particle of spin less than or equal to 1 for WIMPs of spin equal to 0, 1/2 and 1. We show that for interaction operators depending at most linearly on the momentum transfer, the WIMP-induced neutrino flux can be enhanced by several orders of magnitude compared to the same flux in absence of self- interactions. This is true even for standard values of the thermally averaged annihilation cross- section. This conclusion impacts the analysis of present and future observations performed at neutrino telescopes.



Denna post skapades 2016-10-06.
CPL Pubid: 243030