Fermi large area telescope search for photon lines from 30 to 200 GeV and dark matter implications

Phys Rev Lett. 2010 Mar 5;104(9):091302. doi: 10.1103/PhysRevLett.104.091302. Epub 2010 Mar 5.

Abstract

Dark matter (DM) particle annihilation or decay can produce monochromatic gamma rays readily distinguishable from astrophysical sources. gamma-ray line limits from 30 to 200 GeV obtained from 11 months of Fermi Large Area Space Telescope data from 20-300 GeV are presented using a selection based on requirements for a gamma-ray line analysis, and integrated over most of the sky. We obtain gamma-ray line flux upper limits in the range 0.6-4.5x10{-9} cm{-2} s{-1}, and give corresponding DM annihilation cross-section and decay lifetime limits. Theoretical implications are briefly discussed.