(B)over-bar -> X-s gamma in the mu nu SSM

The mu nu SSM, one of supersymmetric extensions beyond the Standard Model, introduces three singlet right-handed neutrino superfields to solve the mu problem and can generate three tiny Majorana neutrino masses through the seesaw mechanism. In this paper, we investigate the rare decay process (B) over bar --> X-s gamma in the mu nu SSM, under a minimal flavor violating assumption for the soft breaking terms. Constrained by the SM-like Higgs with mass around 125 GeV, the numerical results show that the new physics can fit the experimental data for (B) over bar --> X-s gamma and further constrain the parameter space.