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Covariant light-front approach for B-c transition form factors
Wang W(王伟); Lv CD(吕才典); Wang, W; Shen, YL; Lu, CD
2009
发表期刊PHYSICAL REVIEW D
卷号79期号:5页码:54012
通讯作者[Wang, Wei ; Lue, Cai-Dian] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Shen, Yue-Long] Ocean Univ China, Inst Informat Sci & Engn, Qingdao 266100, Peoples R China ; [Lue, Cai-Dian] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
文章类型Article
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.
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.79.054012
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000264762400041
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被引频次:58[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240662
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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GB/T 7714
Wang W,Lv CD,Wang, W,et al. Covariant light-front approach for B-c transition form factors[J]. PHYSICAL REVIEW D,2009,79(5):54012.
APA 王伟,吕才典,Wang, W,Shen, YL,&Lu, CD.(2009).Covariant light-front approach for B-c transition form factors.PHYSICAL REVIEW D,79(5),54012.
MLA 王伟,et al."Covariant light-front approach for B-c transition form factors".PHYSICAL REVIEW D 79.5(2009):54012.
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