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Covariant light-front approach for B(c) transition form factors
Wang, Wei; Shen, Yue-Long; Lue, Cai-Dian; Wang, W , Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
2009
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号79期号:5页码:-
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.
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
关键词Qcd Sum-rules Semileptonic Decays Distribution Amplitude Weak Decays Quark-model K-decays Meson
学科领域Physics
资助者National Natural Science Foundation of China[10735080, 10625525, 10805037] ; National Natural Science Foundation of China[10735080, 10625525, 10805037] ; National Natural Science Foundation of China[10735080, 10625525, 10805037] ; National Natural Science Foundation of China[10735080, 10625525, 10805037]
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收录类别SCI
资助者National Natural Science Foundation of China[10735080, 10625525, 10805037] ; National Natural Science Foundation of China[10735080, 10625525, 10805037] ; National Natural Science Foundation of China[10735080, 10625525, 10805037] ; National Natural Science Foundation of China[10735080, 10625525, 10805037]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5366
专题理论物理所1978-2010年知识产出
通讯作者Wang, W , Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
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Wang, Wei,Shen, Yue-Long,Lue, Cai-Dian,et al. Covariant light-front approach for B(c) transition form factors[J]. PHYSICAL REVIEW D,2009,79(5):-.
APA Wang, Wei,Shen, Yue-Long,Lue, Cai-Dian,&Wang, W , Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.(2009).Covariant light-front approach for B(c) transition form factors.PHYSICAL REVIEW D,79(5),-.
MLA Wang, Wei,et al."Covariant light-front approach for B(c) transition form factors".PHYSICAL REVIEW D 79.5(2009):-.
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