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Positron fraction from dark matter annihilation in the CMSSM

✍ Scribed by W. de Boer; C. Sander; M. Horn; D. Kazakov

Book ID
104355013
Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
533 KB
Volume
117
Category
Article
ISSN
0920-5632

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✦ Synopsis

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 consider in a global analysis the complete SUSY parameter space and find that in the acceptable regions the neutralino annihilate dominantly into bb quark pairs. The positrons from bb improve the fit to the experimental positron fraction data considerably compared to a fit with background only.

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