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arXiv · 1507.05536

Gamma-rays from Heavy Minimal Dark Matter

Camilo Garcia-Cely·Alejandro Ibarra·Anna S. Lamperstorfer·Michel H. G. Tytgat
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Abstract

We consider the annihilation into gamma rays of Minimal Dark Matter candidates in the fermionic 5-plet and scalar 7-plet representations of $SU(2)_L$, taking into account both the Sommerfeld effect and the internal bremsstrahlung. Assuming the Einasto profile, we show that present measurements of the Galactic Center by the H.E.S.S. instrument exclude the 5-plet and 7-plet as the dominant form of dark matter for masses between 1 TeV and 20 TeV, in particular, the 5-plet mass leading to the observed dark matter density via thermal freeze-out. We also discuss prospects for the upcoming Cherenkov Telescope Array, which will be able to probe even heavier dark matter masses, including the scenario where the scalar 7-plet is thermally produced.

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Camilo Garcia-Cely, Alejandro Ibarra, Anna S. Lamperstorfer, Michel H. G. Tytgat. 2015-10-20. Gamma-rays from Heavy Minimal Dark Matter. https://doi.org/10.1088/1475-7516%2F2015%2F10%2F058

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