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Form factors for B(B-c)-> Dlv in light-cone sum rules with chiral current correlator
黄涛(理); Huang, T
2007
发表期刊HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
卷号31期号:9页码:849-856
通讯作者CAS, Inst High Energy Phys, Beijing 100049, Peoples R China
摘要In this paper we calculate the weak form factors of the decays B(B-c) -> Dl (nu) over bar by using the chiral current correlator within the framework of the QCD light-cone sum rules (LCSR). The expressions of the form factors only depend on the leading twist distribution amplitude (DA) of the D meson. Three models of the D-meson distribution amplitude are employed and the calculated form factors,F-B -> D(0) and F-Bc -> D(0) are given. In the velocity transfer region 1.14 < y < 1.59, which renders the Operator Product Expansion (OPE) near light-cone x(2) = 0 to go effectively, the yielding behavior of form factor is in agreement with that extracted from the data on B -> Dl (nu) over bar, within the error. In the large recoil region 1.35 < y < 1.59, the form factor F-B -> D(0) is observed consistent with that of perturbative QCD (pQCD). The presented calculation can play a bridge role connecting those from the lattice QCD, heavy quark symmetry and pQCD to have an all-around understanding of B -> Dl (nu) over bar transitions. Our prediction for F-Bc -> D(0), by using the D-meson distribution amplitude with the exponential suppression at the end points, is compatible with other approaches, and favors the three-points sum rules (3PSR) approach with the Coulumb corrections.
文章类型Article
关键词form factor light-cone sum rules quantum chromodynamics (QCD)
学科领域Physics
研究领域[WOS]Physics
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语种英语
WOS类目Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000249228900012
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238604
专题理论物理室
作者单位中国科学院高能物理研究所
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Huang T,Huang, T. Form factors for B(B-c)-> Dlv in light-cone sum rules with chiral current correlator[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2007,31(9):849-856.
APA 黄涛,&Huang, T.(2007).Form factors for B(B-c)-> Dlv in light-cone sum rules with chiral current correlator.HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,31(9),849-856.
MLA 黄涛,et al."Form factors for B(B-c)-> Dlv in light-cone sum rules with chiral current correlator".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 31.9(2007):849-856.
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