Indirect Evidence for Neutralinos as Dark Matter

Abstract

From the relic density measurement by WMAP the WIMP annihilation cross section can be determined in a model independent way. If the WIMPS are postulated to be the neutralinos of Supersymmetry, then only a limited region of the supersymmetric parameter space matches this annihilation cross section. It is shown that the resulting positrons, antiprotons and gamma rays from the neutralino annihilation (mainly into b-bbar quark pairs) provide the correct shape and order of magnitude for the missing gamma and hard positron fluxes in the Galactic Models and are consistent with antiproton production.

3 pages, 2 figures, prepared for Proc. of EPS 2003 Conf. in Aachen, to be published in EPJ

References in corpus (4)

• Non-Baryonic Dark Matter - Observational Evidence and Detection Methods
• Grand Unified Theories and Supersymmetry in Particle Physics and Cosmology
• Global Electroweak Fits and Gauge Coupling Unification
• Indirect Evidence for the Supersymmetric Nature of Dark Matter from the Combined Data on Galactic Positrons, Antiprotons and Gamma Rays

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• Excess of EGRET Galactic Gamma Ray Data interpreted as Dark Matter Annihilation
• Galactic-Centre Gamma Rays in CMSSM Dark Matter Scenarios
• Light Superpartners at Hadron Colliders
• Determination of Dark Matter Properties at High-Energy Colliders