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14696 |
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|a Beneke, M.
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|a Buchalla, G.
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|a Neubert, M.
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|a Sachrajda, C.T.
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|a QCD Factorization in B -> pi K, pi pi decays and extraction of Wolfenstein parameters
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|c 2001.
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|z Get fulltext
|u https://eprints.soton.ac.uk/14696/1/Wolfenstein.pdf
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|a In the heavy-quark limit, the hadronic matrix elements entering nonleptonic B-meson decays into two light mesons can be calculated from first principles including "nonfactorizable" strong-interaction corrections. The B??K, ?? decay amplitudes are computed including electroweak penguin contributions, SU(3) violation in the light-cone distribution amplitudes, and an estimate of power corrections from chirally-enhanced terms and annihilation graphs. The results are then used to reduce the theoretical uncertainties in determinations of the weak phases ? and ?. In that way, new constraints in the plane are derived. Predictions for the B??K, ?? branching ratios and CP asymmetries are also presented. A good global fit to the (in part preliminary) experimental data on the branching fractions is obtained without taking recourse to phenomenological models
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|a Article
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