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Titolo:
Systematic approach to exclusive B -> Vl(+)l(-), V gamma decays
Autore:
Beneke, M; Feldmann, T; Seidel, D;
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
Titolo Testata:
NUCLEAR PHYSICS B
fascicolo: 1-2, volume: 612, anno: 2001,
pagine: 25 - 58
SICI:
0550-3213(20010924)612:1-2<25:SATEB->2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
MESON DECAYS; LEADING LOGARITHMS; QCD FACTORIZATION; FORM-FACTORS; WEAK DECAYS; QUARK MASS; ASYMMETRY; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
34
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., "Systematic approach to exclusive B -> Vl(+)l(-), V gamma decays", NUCL PHYS B, 612(1-2), 2001, pp. 25-58

Abstract

We show - by explicit computation of first-order corrections - that the QCD factorization approach previously applied to hadronic two-body decays andto form factor ratios also allows us to compute non-factorizable corrections to exclusive, radiative B meson decays in the heavy quark mass limit. This removes a major part of the theoretical uncertainty in the region of small invariant mass of the photon. We discuss in particular the decays B --> K*gamma and B --> K*l(+)l(-) and complete the calculation of corrections tothe forward-backward asymmetry zero. The new correction shifts the asymmetry zero by 30%, but the result confirms our previous conclusion that the asymmetry zero provides a clean phenomenological determination of the Wilson coefficient C-9. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 04/04/20 alle ore 08:12:00