Neutralino cold dark matter in a one-parameter extension of the minimal supergravity model

Baer, Howard, Mustafayev, Azar, Profumo, Stefano, Belyaev, Alexander and Tata, Xerxes (2005) Neutralino cold dark matter in a one-parameter extension of the minimal supergravity model. Physical Review D, 71 (9), 95008. (doi:10.1103/PhysRevD.71.095008).

Abstract

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 coannihilate with a charged or colored particle. Within a one-parameter extension of the mSUGRA model which includes nonuniversal 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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Contributors

Author: Alexander Belyaev

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