Bounds on the CP Asymmetry in b --> sγ Decays

We have measured the CP asymmetry A_CP≡[γ\(b-->sγ\)- γ\(b¯-->s¯γ\)]/ [γ\(b-->sγ\)+γ\(b¯-->s¯γ\)] to be A_CP = \(-0.079+/-0.108+/-0.022\) \(1.0+/-0.030\), implying that, at 90% confidence level, A_CP lies between -0.27 and +0.10. These limits rule out some extreme non-standard-model predictions, but are consistent with most, as well as with the standard model.