Positron Fraction in the CMSSM

Details Positron Fraction in the CMSSM Positron Fraction in the CMSSM

2002-12-18

arxiv.org/abs/astro-ph/0212388v1

Astronomy and Astrophysics

Astrophysics

6 pages, Latex, Proceedings of the 4th International Workshop on Identification of Dark Matter (idm2002), York, England, 2-6 S

Scientific paper

A fit to the present data on the cosmic ray positron fraction can be considerably improved,if in addition to the positron production by nuclear interactions in the universe the possible contribution from supersymmetric dark matter annihilation is taken into account. We scan over the complete SUSY parameter space of the Constrained Minimal Supersymmetric Model (CMSSM) and find that in the acceptable regions the neutralino annihilation into b-bbar quark pairs is the dominant channel with hard positrons emerging from the semileptonic decays of the B-mesons.

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