Strong Upper Limits on Sterile Neutrino Warm Dark Matter
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
Sterile neutrinos are attractive dark matter candidates. Their parameter space of mass and mixing angle has not yet been fully tested despite intensive efforts that exploit their gravitational clustering properties and radiative decays. We use the limits on gamma-ray line emission from the Galactic Center region obtained with the SPI spectrometer on the INTEGRAL satellite to set new constraints, which improve on the earlier bounds on mixing by more than two orders of magnitude, and thus strongly restrict a wide and interesting range of models.
4 pages, 2 figures; minor revisions, accepted for publication in Physical Review Letters
4 pages, 2 figures; minor revisions, accepted for publication in Physical Review Letters