corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 101 » Issue 12
< Previous Article | Next Article >

Phys. Rev. Lett. 101, 121301 (2008) [4 pages]

Strong Upper Limits on Sterile Neutrino Warm Dark Matter

Download: PDF (160 kB) Buy this article Export: BibTeX or EndNote (RIS)

Hasan Yüksel1,2, John F. Beacom1,2,3, and Casey R. Watson4
1Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
2Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210, USA
3Department of Astronomy, Ohio State University, Columbus, Ohio 43210, USA
4Department of Physics and Astronomy, Millikin University, Decatur, Illinois 62522, USA

Received 27 June 2007; published 18 September 2008

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 2 orders of magnitude, and thus strongly restrict a wide and interesting range of models.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.121301
DOI:
10.1103/PhysRevLett.101.121301
PACS:
95.35.+d, 14.60.Pq, 14.60.St, 98.70.Rz
 
< Previous Article | Next Article >