Circumscribing Late Dark Matter Decays Model Independently

Details Circumscribing Late Dark Matter Decays Model Independently Circumscribing Late Dark Matter Decays Model Independently

2007-11-19

arxiv.org/abs/0711.2906v2

Phys.Rev.D78:023502,2008

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures; minor revisions, title changed, to be published in PRD

Scientific paper

10.1103/PhysRevD.78.023502

A number of theories, spanning a wide range of mass scales, predict dark matter candidates that have lifetimes much longer than the age of the universe, yet may produce a significant flux of gamma rays in their decays today. We constrain such late decaying dark matter scenarios model-independently by utilizing gamma-ray line emission limits from the Galactic Center region obtained with the SPI spectrometer on INTEGRAL, and the determination of the isotropic diffuse photon background by SPI, COMPTEL and EGRET observations. We show that no more than ~5% of the unexplained MeV background can be produced by late dark matter decays either in the Galactic halo or cosmological sources.

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