Kavli Affiliate: Liantao Wang
| First 5 Authors: Dan Hooper, Lian-Tao Wang, , ,
| Summary:
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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