Probing Dark Matter Long-lived Mediators with Solar ${\hat{I}}^3$ rays

Abstract

We show that solar ${\hat{I}}^3$-ray observations can provide a complementary probe of Dark Matter in scenarios where the interactions with the Standard Model proceed via long-lived mediators. For illustration we consider a simplified model which provides solar ${\hat{I}}^3$-ray fluxes observable with the next generation ${\hat{I}}^3$-ray telescopes, while complying with the existing experimental constraints. Our results suggest that solar ${\hat{I}}^3$-ray fluxes can be orders of magnitude larger than the ones from the Galactic center, while being subject to low backgrounds.

4 pages, 2 figures. To appear in the proceedings of The European Physical Society Conference on High Energy Physics, 5-12 July 2017 in Venice, Italy