scholarly journals CONSTRAINTS ON B→π, K TRANSITION FORM-FACTORS FROM EXCLUSIVE SEMILEPTONIC D-MESON DECAYS

2011 ◽  
Vol 26 (19) ◽  
pp. 3185-3199 ◽  
Author(s):  
FANG SU ◽  
YA-DONG YANG
Keyword(s):  
Phenomenological Study ◽  
B Meson ◽  
D Meson ◽  
Form Factors ◽  
Transition Form ◽  
B Meson Decays ◽  
Factorization Approach ◽  
Meson Decays ◽  
Central Values ◽  
Qcd Factorization

According to the heavy-quark flavor symmetry, the B→π, K transition form-factors could be related to the corresponding ones of D-meson decays near the zero recoil point. With the recent precisely measured exclusive semileptonic decays D →πℓν and D→K ℓν, we perform a phenomenological study of B →π, K transition form-factors based on this symmetry. Using BK, BZ and Series Expansion parametrizations of the form-factor slope, we extrapolate B →π, K transition form-factors from [Formula: see text] to q2 = 0. It is found that, although being consistent with each other within error bars, the central values of our results for B →π, K form-factors at q2 = 0, [Formula: see text], are smaller than predictions of the QCD light-cone sum rules, but are in good agreements with the ones extracted from hadronic B-meson decays within the SCET framework. Moreover, smaller form-factors are also favored by the QCD factorization approach for hadronic B-meson decays.

WEAK TRANSITION FORM FACTORS IN RARE HEAVY MESON DECAYS

1991 ◽  
Vol 06 (14) ◽  
pp. 1277-1284 ◽  
Author(s):  
Y.L. WU
Keyword(s):  
B Meson ◽  
Form Factors ◽  
Heavy Meson ◽  
Direct Application ◽  
Transition Form ◽  
B Meson Decays ◽  
Meson Decays ◽  
Weak Transition ◽  
Model Independent ◽  
General Relations

The transition form factors required for the rare heavy meson decays are evaluated. The model-independent absolutely normalized form factors, written in a compact form, among heavy to light and heavy to heavy meson transitions in the states such as 0−+→0−+, 1−, 0++, 1++ are given. A set of general relations among the form factors is obtained. The form factors involved in the rare B-meson decays are given as a direct application.

scholarly journals B MESON LIGHT-CONE DISTRIBUTION AMPLITUDES AND HEAVY-QUARK SYMMETRY

2003 ◽  
Vol 18 (08) ◽  
pp. 1433-1436 ◽  
Author(s):  
HIROYUKI KAWAMURA ◽  
JIRO KODAIRA ◽  
CONG-FENG QIAO ◽  
KAZUHIRO TANAKA
Keyword(s):  
Heavy Quark ◽  
Light Cone ◽  
Degrees Of Freedom ◽  
B Meson ◽  
Equations Of Motion ◽  
B Meson Decays ◽  
Factorization Approach ◽  
Qcd Factorization ◽  
Heavy Quark Symmetry ◽  
Dynamical Degrees

We present a systematic study of the B meson light-cone distribution amplitudes which are relevant for the QCD factorization approach for the exclusive B meson decays. We construct representations for the quark-antiquark distribution amplitudes in terms of independent dynamical degrees of freedom, which exactly satisfy the QCD equations of motion and constraints from heavy-quark symmetry.

scholarly journals ANGULAR DISTRIBUTION ANALYSIS OF B → J/ψ K* AND RESOLVING DISCRETE AMBIGUITIES IN THE DETERMINATION OF ϕ1

2003 ◽  
Vol 18 (08) ◽  
pp. 1437-1442 ◽  
Author(s):  
H.-Y. CHENG ◽  
Y.-Y. KEUM ◽  
K.-C. YANG
Keyword(s):  
Angular Distribution ◽  
B Meson ◽  
Factorization Method ◽  
Distribution Analysis ◽  
B Meson Decays ◽  
Factorization Approach ◽  
Qcd Factorization ◽  
The Status ◽  
Unitary Triangle

We discuss the angular distribution analysis of B → J/ψ K* decays and a way to resolve discrete ambiguites in the determination of the unitary triangle ϕ1(=β). We study the status of factorization hypothesis in the color-suppressed B meson decays: B → J/ψ K(*) within the general factorization approach and QCD-factorization method.

scholarly journals QCD Factorization and Rare B Meson Decays

2006 ◽  
Vol 21 (04) ◽  
pp. 658-663 ◽  
Author(s):  
DONGSHENG DU
Keyword(s):  
Recent Progress ◽  
B Meson ◽  
Infrared Divergence ◽  
B Decays ◽  
B Meson Decays ◽  
Meson Decays ◽  
Power Corrections ◽  
Qcd Factorization ◽  
Charmless B Decays ◽  
Divergence Problem

Some recent progress in China in the study of charmless B decays with QCD factorization is reviewed. Chirally enhanced power corrections and infrared divergence problem are stressed.

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