Higgsino Dark Matter in a SUGRA Model with Nonuniversal Gaugino Masses

Details Higgsino Dark Matter in a SUGRA Model with Nonuniversal Gaugino Masses Higgsino Dark Matter in a SUGRA Model with Nonuniversal Gaugino Masses

2003-04-11

arxiv.org/abs/hep-ph/0304108v2

Phys.Rev. D68 (2003) 033010

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version to appear in Phys. Rev. D. A few references added in the bibliography and a comment added in Section 2. LaTex, 16 page

Scientific paper

10.1103/PhysRevD.68.033010

We study a specific SUGRA model with nonuniversal gaugino masses as an alternative to the minimal SUGRA model in the context of supersymmetric dark matter. The lightest supersymmetric particle in this model comes out to be a Higgsino dominated instead of a bino dominated lightest neutralino. The thermal relic density of this Higgsino dark matter is somewhat lower than the cosmologically favoured range, which means it may be only a subdominant component of the cold dark matter. Nonetheless, it predicts favourable rates of indirect detection, which can be seen in square-km size neutrino telescopes.

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