On the Relevance of Sharp Gamma-Ray Features for Indirect Dark Matter Searches

Details On the Relevance of Sharp Gamma-Ray Features for Indirect Dark Matter Searches On the Relevance of Sharp Gamma-Ray Features for Indirect Dark Matter Searches

2011-06-09

arxiv.org/abs/1106.1874v2

Phys. Rev. D 84 (2011) 103525

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 5 figures, 2 tables, extended version as published in PRD

Scientific paper

10.1103/PhysRevD.84.103525

Gamma rays from the annihilation of dark matter particles in the Galactic halo provide a particularly promising means of indirectly detecting dark matter. Here, we demonstrate that pronounced spectral features at energies near the dark matter particles' mass, which are a generic prediction for most models, can significantly improve the sensitivity of gamma-ray telescopes to dark matter signals. We derive projected limits on such features (including the traditionally looked-for line signals) and show that they can be much more efficient in constraining the nature of dark matter than the model-independent broad spectral features expected at lower energies.

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