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APS » Journals » Phys. Rev. Lett. » Volume 92 » Issue 10
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Phys. Rev. Lett. 92, 101301 (2004) [4 pages]

MeV Dark Matter: Has It Been Detected?

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Céline Boehm1, Dan Hooper1, Joseph Silk1,2, Michel Casse2,3, and Jacques Paul3,4
1Denys Wilkinson Laboratory, Astrophysics Department, Oxford University, OX1 3RH Oxford, United Kingdom
2Institut d’Astrophysique de Paris, 98 bis Boulevard Arago, 75014 Paris, France
3DAPNIA/Service d’Astrophysique, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France
4Fédération de Recherche Astroparticule et Cosmologie, Université Paris 7, 2 place Jussieu, 75251 Paris Cedex 05, France

Received 1 October 2003; published 12 March 2004

We discuss the possibility that the recent detection of 511 keV γ rays from the galactic bulge, as observed by INTEGRAL, is a consequence of low mass (1–100   MeV) particle dark matter annihilations. We discuss the type of halo profile favored by the observations as well as the size of the annihilation cross section needed to account for the signal. We find that such a scenario is consistent with the observed dark matter relic density and other constraints from astrophysics and particle physics.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.101301
DOI:
10.1103/PhysRevLett.92.101301
PACS:
95.35.+d, 98.70.Rz, 98.70.Sa
 
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