Possible Evidence For Axino Dark Matter In The Galactic Bulge

Details Possible Evidence For Axino Dark Matter In The Galactic Bulge Possible Evidence For Axino Dark Matter In The Galactic Bulge

2004-02-20

arxiv.org/abs/hep-ph/0402220v3

Phys.Rev. D70 (2004) 063506

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure. Version accepted by Physical Review D

Scientific paper

10.1103/PhysRevD.70.063506

Recently, the SPI spectrometer on the INTEGRAL satellite observed strong 511 keV line emission from the galactic bulge. Although the angular distribution (spherically symmetric with width of \sim 9 degree) of this emission is difficult to account for with traditional astrophysical scenarios, light dark matter particles could account for the observation. In this letter, we consider the possibility that decaying axinos in an R-parity violating model of supersymmetry may be the source of this emission. We find that \sim 1-300 MeV axinos with R-parity violating couplings can naturally produce the observed emission.

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