Decay rate asymmetry in B→Xsγ as a signature of supersymmetry -: art. no. 035004.

In the supersymmetric standard model, the radiative B-meson decay B --> X(s)gamma could receive a large contribution from a new source of flavor-changing neutral current, which also violates CP invariance. The CP-conjugate processes then may sizably differ in decay width. If a new CP-violating phase is not suppressed, this decay rate asymmetry can be significantly larger than the prediction by the standard model, possibly detectable at B factories. Such a large asymmetry may be implied by the measured branching ratio which is consistent with the standard model. [S0556-2821(99)08313-7].