Dark Matter Signals In Cosmic Rays?

Details Dark Matter Signals In Cosmic Rays? Dark Matter Signals In Cosmic Rays?

2009-03-02

arxiv.org/abs/0903.0165v2

Mem.Soc.Ast.It. 81: 132,2010

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Added references. Typos corrected

Scientific paper

The flux of the diffuse gamma-ray background radiation (GBR) does not confirm that the excess in the flux of cosmic ray electrons between 300-800 GeV, which was measured locally with the ATIC instrument in balloon flights over Antartica, is universal as expected from dark matter annihilation. Neither does the increase with energy of the fraction of positrons in the cosmic ray flux of electrons in the 10-100 GeV range that was measured by PAMELA imply a dark matter origin: It is consistent with that expected from the sum of the two major sources of Galactic cosmic rays, non relativistic spherical ejecta and highly relativistic jets from supernova explosions.

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