http://arxiv.org/abs/1703.08087
We show that observations of solar $\gamma$-ray fluxes offer a novel probe of dark matter, in scenarios where interactions with the visible sector proceed via a long-lived mediator. As a proof of principle, we demonstrate that there exists a class of models which yield solar $\gamma$-ray lines observable with the next generation of $\gamma$-ray telescopes, while being allowed by a large variety of experimental constraints. Our results suggest that fluxes of solar $\gamma$-ray lines can be up to two orders of magnitude higher than the ones from the galactic center, and are subject to very low backgrounds. Solar $\gamma$-ray observations are complementary to the future direct/indirect dark matter detection efforts, especially when dark matter capture and annihilation in the Sun happen out of equilibrium.
C. Arina, M. Backovic, J. Heisig, et. al.
Fri, 24 Mar 17
6/41
Comments: 12 pages + references, 6 figures
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