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arXiv · 1306.4681

Novel Gamma-ray Spectral Features in the Inert Doublet Model

Camilo Garcia-Cely·Alejandro Ibarra
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Abstract

The inert doublet model contains a neutral stable particle which is an excellent dark matter candidate. We discuss in this paper the indirect signatures of this model in gamma-rays when the dark matter mass is larger than the $W$ boson mass. We show that, in addition to the featureless gamma-ray spectrum produced in the annihilations into two weak gauge bosons, the model generically predicts a distinctive spectral feature from the internal bremsstrahlung process $H^0 H^0 \rightarrow W^+ W^- γ$. We discuss under which conditions the spectral feature is generated and we construct a number of benchmark points, compatible with the observed relic density and all other direct and indirect detection experiments, which lead to a sharp gamma-ray feature from internal bremsstrahlung.

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Camilo Garcia-Cely, Alejandro Ibarra. 2013-09-24. Novel Gamma-ray Spectral Features in the Inert Doublet Model. https://doi.org/10.1088/1475-7516%2F2013%2F09%2F025

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