QCD Factorization in B -> pi K, pi pi decays and extraction of Wolfenstein parameters
QCD Factorization in B -> pi K, pi pi decays and extraction of Wolfenstein parameters
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
245-321
Beneke, M.
fdc331cd-2ac7-45b0-b029-b4adb614d332
Buchalla, G.
e272ee94-b3db-41d0-a95d-aa202ed85cd2
Neubert, M.
748c5621-4d14-45bc-b1f2-74bf1b35fcc8
Sachrajda, C.T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
2001
Beneke, M.
fdc331cd-2ac7-45b0-b029-b4adb614d332
Buchalla, G.
e272ee94-b3db-41d0-a95d-aa202ed85cd2
Neubert, M.
748c5621-4d14-45bc-b1f2-74bf1b35fcc8
Sachrajda, C.T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
Beneke, M., Buchalla, G., Neubert, M. and Sachrajda, C.T.
(2001)
QCD Factorization in B -> pi K, pi pi decays and extraction of Wolfenstein parameters.
Nuclear Physics B, 606 (1-2), .
(doi:10.1016/S0550-3213(01)00251-6).
Abstract
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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Published date: 2001
Identifiers
Local EPrints ID: 14696
URI: http://eprints.soton.ac.uk/id/eprint/14696
ISSN: 0550-3213
PURE UUID: 96910c0e-7cc8-4462-9adc-b98ace9fedf2
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Date deposited: 22 Feb 2005
Last modified: 15 Mar 2024 05:30
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Author:
M. Beneke
Author:
G. Buchalla
Author:
M. Neubert
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