Neutralino Dark Matter in Focus Point Supersymmetry

Details Neutralino Dark Matter in Focus Point Supersymmetry Neutralino Dark Matter in Focus Point Supersymmetry

2000-04-06

arxiv.org/abs/hep-ph/0004043v2

Phys.Lett.B482:388-399,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 6 figures, version to appear in Phys. Lett. B. References added, minor modifications of Figs. 2 and 4 due to a bug (

Scientific paper

10.1016/S0370-2693(00)00512-8

In recent work, it has been argued that multi-TeV masses for scalar superpartners are not unnatural. Indeed, they appear to have significant phenomenological virtues. Here we explore the implications of such `focus point' supersymmetry for the dark matter problem. We find that constraints on relic densities do not place upper bounds on neutralino or scalar masses. We demonstrate that, in the specific context of minimal supergravity, a cosmologically stable mixed gaugino-Higgsino state emerges as an excellent, robust dark matter candidate. We estimate that, over a wide range of the unknown parameters, the spin-independent proton-neutralino cross sections fall in the range accessible to planned search experiments.

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