QCD factorization for charmless hadronicBsdecays revisited
نویسندگان
چکیده
منابع مشابه
Reexamining charmless B → PV decays in QCD factorization approach
Using the QCD factorization approach, we reexamine the two-body hadronic charmless B-meson decays to final states involving a pseudoscalar (P ) and a vector (V ) meson, with inclusion of the important penguin contractions of the spectator-scattering amplitudes induced by the b → Dg∗g∗ (with D = d or s, and g∗ denoting an off-shell gluon) transition, which are of order αs. Their impacts on the C...
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In the heavy quark limit, both vector mesons in the charmless B → V V decay should have zero helicity and the corresponding amplitude is proportional to the form factor difference (A1 − A2). The first observed charmless B → V V mode, B → φK∗, indicates that the form factors A1(q) and A2(q 2) cannot be very similar at low q2 as shown in some form-factor models. The approach of QCD-improved facto...
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In this paper, we do a global analysis of B → PP and PV decays with QCD factorization approach. It is encouraging to observe that the predictions of QCD factorization are in good agreement with the experiments. The best fit γ is around 79◦. The penguin-to-tree ratio |Pππ/Tππ| of π+π− decays is prefered to be larger than 0.3. We also show the confidence levels for some interesting channels: B0 →...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2009
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.80.114026