130 GeV Gamma Ray Signal in NMSSM by Internal Bremsstrahlung

Abstract

There is a possible \gamma-ray signal at 130 GeV coming from the Galactic Center as seen by Fermi-LAT experiment. We give a SUSY dark matter model to explain this \gamma-ray feature in NMSSM. We show that in NMSSM, one can have a benchmark set in which the \gamma-ray signal arises from final state \gamma's in the $\chi\chi \to f \bar f \gamma $ annihilation of a 130 GeV bino dark matter requiring a boost factor of ~590 to fit the \gamma-ray signal. In addition, this benchmark set also gives the correct relic density, lightest Higgs mass of 125 GeV and is consistent with constraints on SUSY from LHC. This dark matter model evades the XENON100 constraint but is testable in a future XENON1T experiment.