Neutralino Cold Dark Matter in a One Parameter Extension of the Minimal Supergravity Model

Details Neutralino Cold Dark Matter in a One Parameter Extension of the Minimal Supergravity Model Neutralino Cold Dark Matter in a One Parameter Extension of the Minimal Supergravity Model

2004-12-03

arxiv.org/abs/hep-ph/0412059v2

Phys.Rev. D71 (2005) 095008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 page revtex file plus 2 EPS figures

Scientific paper

10.1103/PhysRevD.71.095008

Within the minimal supergravity model (mSUGRA) framework, the expectation for the relic density of neutralinos exceeds the WMAP determination unless neutralinos a) have a significant higgsino component, b) have a mass close to half that of a heavy Higgs boson, or c)can efficiently co-annihilate with a charged or colored particle. Within a 1-parameter extension of the mSUGRA model which includes non-universal Higgs masses, we show that agreement with the WMAP data can be obtained over a wide range of mSUGRA parameters for scenarios a) and b), so that the phenomenological implications may be much more diverse than in mSUGRA. We show that direct and/or indirect detection of neutralino dark matter should be possible at various current and planned facilities.

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