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题名: Covariant light-front approach for B(c) transition form factors
作者: Wang, Wei ;  Shen, Yue-Long ;  Lue, Cai-Dian
刊名: PHYSICAL REVIEW D
出版日期: 2009
卷号: 79, 期号:5, 页码:-
关键词: QCD SUM-RULES ;  SEMILEPTONIC DECAYS ;  DISTRIBUTION AMPLITUDE ;  WEAK DECAYS ;  QUARK-MODEL ;  K-DECAYS ;  MESON
学科分类: Physics
通讯作者: Wang, W , Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
部门归属: [Wang, W; Lu, CD] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [Shen, YL] Ocean Univ China, Inst Informat Sci & Engn, Qingdao 266100, Peoples R China; [Lu, CD] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
英文摘要: In the covariant light-front quark model, we investigate the form factors of B(c) decays into D, D(*), D(s), D(s)(*), eta(c), J/psi, B, B(*), B(s), and B(s)(*) mesons. The form factors in the spacelike region are directly evaluated. To extrapolate the form factors to the physical region, we fit the form factors by adopting a suitable three-parameter form. At the maximally recoiling point, b -> u, d, and s transition form factors are smaller than b -> c and c -> d, s form factors, while the b -> u, d, s, and c form factors at the zero-recoiling point are close to each other. In the fitting procedure, we find that parameters in A(2)(c)(B)B(*) and A(2)(c)(B)B(s)(*) strongly depend on decay constants of B(*) and B(s)(*) mesons. Fortunately, semileptonic and nonleptonic B(c) decays are not sensitive to these two form factors. We also investigate branching fractions, polarizations of the semileptonic B(c) decays. B(c)->(eta(c),J/psi)l nu and B(c)->(B(s),B(s)(*))l nu decays have much larger branching fractions than B(c)->(D,D(*),B,B(*))l nu. For the three kinds of B(c)-> Vl nu decays, longitudinal contributions are comparable with the transverse contributions. These predictions will be tested on the ongoing and forthcoming hadron colliders.
资助者: National Natural Science Foundation of China[10735080, 10625525, 10805037]
收录类别: SCI
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5366
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Recommended Citation:
Wang, Wei,Shen, Yue-Long,Lue, Cai-Dian. Covariant light-front approach for B(c) transition form factors[J]. PHYSICAL REVIEW D,2009,79(5):-.
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