Novel Spectral Features in MeV Gamma Rays from Dark Matter
High Energy Physics - Phenomenology
2017-02-20 v2
Abstract
Astrophysical searches for gamma rays are one of the main strategies to probe the annihilation or decay of dark matter particles. We present a new class of distinct sub-GeV spectral features that generically appear in kinematical situations where the available center-of-mass energy in such processes is just above threshold to produce excited meson states. Using a Fisher forecast with realistic astrophysical backgrounds, we demonstrate that for upcoming experiments like e-ASTROGAM and ComPair these signals can turn out to be the smoking gun in the search for particle dark matter.
Cite
@article{arxiv.1610.04613,
title = {Novel Spectral Features in MeV Gamma Rays from Dark Matter},
author = {Torsten Bringmann and Ahmad Galea and Andrzej Hryczuk and Christoph Weniger},
journal= {arXiv preprint arXiv:1610.04613},
year = {2017}
}
Comments
7 pages revtex4-1, 5 figures; minor updates in sensitivity figures and discussion. Matches published version