Dark matter interpretation of recent electron and positron data

Abstract

We analyze the recently released Fermi-LAT data on the sum of electrons and positrons. Compared to a conventional, pre-Fermi, background model, a surprising excess in the several hundred GeV range is found and here we analyze it in terms of dark matter models. We also compare with newly published results from PAMELA and HESS, and find models giving very good fits to these data sets as well. If this dark matter interpretation is correct, we also predict the possibility of a sharp break in the diffuse gamma ray spectrum coming from final state radiation.

5 pages, 2 figures, pdflatex

References in corpus (2)

• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• Substructure Boosts to Dark Matter Annihilation from Sommerfeld Enhancement

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• How Dark Matter Reionized The Universe
• Extended MSSM Neutralinos as the Source of the PAMELA Positron Excess
• Decaying neutralino dark matter in anomalous $U(1{)}_H$ models
• Decaying dark matter with heavy axino
• On discrepancy between ATIC and Fermi data
• Inverse Problem of Cosmic-Ray Electron/Positron from Dark Matter