Supersymmetric Dark Matter and the Extragalactic Gamma Ray Background
Abstract
We trace the origin of the newly determined extragalactic gamma ray background from EGRET data to an unresolved population of blazars and neutralino annihilation in cold dark matter halos. Using results of high-resolution simulations of cosmic structure formation, we calculate composite spectra and compare with the EGRET data. The resulting best-fit value for the neutralino mass is mchi = (515 +/- 110/75) GeV (systematic errors \~30%).
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