Exploring the Weak Phase gamma in B^+- -> pi K Decays
classification
✦ hep-ph
keywords
gammadecaysdegreesphaseweakalongboundbounds
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Measurements of the rates for the hadronic decays B^+- -> pi K along with the CP-averaged B^+- -> pi^+- pi^0 branching ratio can be used to bound and extract the weak phase gamma=-arg(V_ub). Using preliminary CLEO data, we obtain the bounds |gamma|>93 degrees at 1 sigma, and |gamma|>71 degrees at 90 % confidence level.
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