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Bounds on the CP asymmetry in b --> sgamma decays

, : Bounds on the CP asymmetry in b --> sgamma decays. Physical Review Letters 86(25): 5661-5665

We have measured the CP asymmetry A(CP) identical with[gamma(b-->sgamma)-gammab-->sgamma)]/[gamma(b-->sgamma)+gamma(b-->sgamma)] 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.


PMID: 11415327

DOI: 10.1103/PhysRevLett.86.5661

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