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Titolo:
QCD factorization in B -> pi K, pi pi decays and extraction of Wolfensteinparameters
Autore:
Beneke, M; Buchalla, G; Neubert, M; Sachrajda, CT;
Indirizzi:
Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany Rhein Westfal TH Aachen Aachen Germany D-52056 , D-52056 Aachen, Germany CERN, Div Theory, CH-1211 Geneva 23, Switzerland CERN Geneva Switzerland23 N, Div Theory, CH-1211 Geneva 23, Switzerland Cornell Univ, Newman Lab Nucl Studies, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 n Lab Nucl Studies, Ithaca, NY 14853 USA Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, EnglandUniv Southampton Southampton Hants England SO17 1BJ 7 1BJ, Hants, England
Titolo Testata:
NUCLEAR PHYSICS B
fascicolo: 1-2, volume: 606, anno: 2001,
pagine: 245 - 321
SICI:
0550-3213(20010709)606:1-2<245:QFIB-P>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
CKM-ANGLE-GAMMA; HEAVY MESON DECAYS; TO-LEADING ORDER; WEAK PHASE-GAMMA; PENGUIN CONTRIBUTIONS; B->PI-K DECAYS; NONLEPTONIC DECAYS; LEPTONIC DECAYS; STANDARD MODEL; CP ASYMMETRIES;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
106
Recensione:
Indirizzi per estratti:
Indirizzo: Beneke, M Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany Rhein Westfal TH Aachen Aachen Germany D-52056 Aachen, Germany
Citazione:
M. Beneke et al., "QCD factorization in B -> pi K, pi pi decays and extraction of Wolfensteinparameters", NUCL PHYS B, 606(1-2), 2001, pp. 245-321

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 --> piK, pi pi decay amplitudes are computed including electroweak penguin contributions, SU(3) violation in the light-cone distribution amplitudes, and anestimate of power corrections from chirally-enhanced terms and annihilation graphs. The results are then used to reduce the theoretical uncertaintiesin determinations of the weak phases gamma and alpha. In that way, new constraints in the (<(<rho>)over bar>, <(<eta>)over bar>) plane are derived. Predictions for the B --> nK, pi pi branching ratios and CP asymmetries are also presented. A good global fit to the (in part preliminary) experimentaldata on the branching fractions is obtained without taking recourse to phenomenological models. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 23/01/20 alle ore 18:24:58