Detection prospects for Majorana fermion WIMPless dark matter

作者：Fukushima Keita^*; Kumar Jason; Sandick Pearl

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2011, 84(1): 014020.

DOI：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 minimal supersymmetric standard model 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.

• 出版日期2011-7-19