Covariant light-front approach for B(c) transition form factors

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	Covariant light-front approach for B(c) transition form factors
	Wang, W , Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; Wang, Wei; Shen, Yue-Long; Lue, Cai-Dian
刊名	PHYSICAL REVIEW D
	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
ISSN号	1550-7998
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.
学科主题	Physics
URL标识	查看原文
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5366]
专题	理论物理研究所_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
推荐引用方式 GB/T 7714	Wang, W , Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China,Wang, Wei,Shen, Yue-Long,et al. Covariant light-front approach for B(c) transition form factors[J]. PHYSICAL REVIEW D,2009,79(5):-.
APA	Wang, W , Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China,Wang, Wei,Shen, Yue-Long,&Lue, Cai-Dian.(2009).Covariant light-front approach for B(c) transition form factors.PHYSICAL REVIEW D,79(5),-.
MLA	Wang, W , Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China,et al."Covariant light-front approach for B(c) transition form factors".PHYSICAL REVIEW D 79.5(2009):-.