Significant Enhancement of Neutralino Dark Matter Annihilation from Electroweak Bremsstrahlung

Abstract

Indirect searches for the cosmological dark matter have become ever more competitive during the past years. Here, we report the first full calculation of leading electroweak corrections to the annihilation rate of supersymmetric neutralino dark matter. We find that these corrections can be huge, partially due to contributions that have been overlooked so far. Our results imply a significantly enhanced discovery potential of this well motivated dark matter candidate with current and upcoming cosmic ray experiments, in particular for gamma rays and models with somewhat small annihilation rates at tree level.

7 pages revtex4; 4 figures. Minor changes to match published version

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• Gamma-ray Limits on Neutrino Lines
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• Dark Matter and Fundamental Physics Searches with IACTs
• Review on Dark Matter Tools