Detection Prospects for Majorana Fermion WIMPless Dark Matter

Details Detection Prospects for Majorana Fermion WIMPless Dark Matter Detection Prospects for Majorana Fermion WIMPless Dark Matter

2011-03-25

arxiv.org/abs/1103.5068v2

Phys.Rev.D84:014020,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 3 figures. v2: updated to match published version

Scientific paper

10.1103/PhysRevD.84.014020

We consider both velocity-dependent and velocity-independent contributions to spin-dependent (SD) and spin-independent (SI) nuclear scattering (including one-loop corrections) of WIMPless dark matter, in the case where the dark matter candidate is a Majorana fermion. We find that spin-independent scattering arises only from the mixing of exotic squarks, or from velocity-dependent terms. Nevertheless (and contrary to the case of MSSM neutralino WIMPs), we find a class of models which cannot be detected through SI scattering, but can be detected at IceCube/DeepCore through SD scattering. We study the detection prospects for both SI and SD detection strategies for a large range of Majorana fermion WIMPless model parameters.

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