Positron Fraction from Dark Matter Annihilation in the CMSSM

Abstract

We investigate, if the cosmic ray positron fraction, as reported by the HEAT and AMS collaborations, is compatible with the annihilation of neutralinos in the supergravity inspired Constrained Minimal Supersymmetric Model (CMSSM), thus complementing previous investigations, which did not consider constraints from unification, electroweak symmetry breaking and the present Higgs limits at LEP. We perform a global fit of all SUSY parameters to low energy constraints and find that in the acceptable parameter regions the neutralino annihilation into b-bbar quark pairs is the dominant channel and improves the fit to the experimental positron fraction data considerably with respect to a fit with background only. These fits are comparable to the fit for regions of parameter space, where the annihilation into W^+ W^- pairs dominates. However, these latter regions are ruled out by the present Higgs limit of 114 GeV from LEP in combination with b->s gamma data.

arXiv comment8 pages, 10 figures, Elba SpacePart Conference

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Cited by in corpus (9)

• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• Searching for Dark Matter with Future Cosmic Positron Experiments
• Detection of Leptonic Dark Matter
• Cosmic Positron Signature from Dark Matter in the Littlest Higgs Model with T-parity
• Dark matter detection in the BMSSM
• Indirect Detection of Dirac Right-Handed Neutrino Dark Matter
• Exploring SUSY light Higgs boson scenarios via dark matter experiments
• Positrons in Cosmic Rays from Dark Matter Annihilations for Uplifted Higgs Regions in MSSM
• Dark Stars and Boosted Dark Matter Annihilation Rates