Generating x-ray lines from annihilating dark matter
Abstract
We propose different scenarios where a keV dark matter annihilates to produce a monochromatic signal. The process is generated through the exchange of a light scalar of mass of order 300 keV-50 MeV coupling to photon through loops or higher-dimensional operators. For natural values of the couplings and scales, the model can generate a gamma-ray line which can fit with the recently identified 3.5 keV x-ray line.
- Publication:
-
Physical Review D
- Pub Date:
- August 2014
- DOI:
- 10.1103/PhysRevD.90.035002
- arXiv:
- arXiv:1404.1927
- Bibcode:
- 2014PhRvD..90c5002D
- Keywords:
-
- 95.30.Cq;
- 95.35.+d;
- 12.60.-i;
- Elementary particle processes;
- Dark matter;
- Models beyond the standard model;
- High Energy Physics - Phenomenology;
- Astrophysics - High Energy Astrophysical Phenomena;
- High Energy Physics - Theory
- E-Print:
- 10 pages, 8 figures