In:
International Journal of Modern Physics A, World Scientific Pub Co Pte Ltd, Vol. 26, No. 19 ( 2011-07-30), p. 3185-3199
Abstract:
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 q 2 = 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 q 2 = 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.
Type of Medium:
Online Resource
ISSN:
0217-751X
,
1793-656X
DOI:
10.1142/S0217751X11053791
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2011
SSG:
16,12
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