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题名: B-c -> D-(*T-) decays in perturbative QCD approach
作者: Zou, ZT ;  Yu, X ;  Lu, CD
刊名: PHYSICAL REVIEW D
出版日期: 2013
卷号: 87, 期号:7, 页码:74027
关键词: MESON DECAYS ;  SUM-RULES ;  HEAVY QUARKONIUM ;  TENSOR MESONS ;  LIFETIME ;  PI
学科分类: Physics
通讯作者: Zou, ZT (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
部门归属: [Zou, Zhi-Tian; Yu, Xin; Lu, Cai-Dian] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [Zou, Zhi-Tian; Yu, Xin; Lu, Cai-Dian] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China; [Lu, Cai-Dian] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
英文摘要: In this work, we investigate B-c -> D-(*T-) decays in the perturbative QCD approach, based on k(T) factorization, where T denotes a light tensor meson. For all decays considered in this work, there are no contributions from factorizable emission diagrams because the emitted tensor meson cannot be generated from (axial-)vector current or (pseudo)scalar density. We find that the annihilation amplitudes are dominant in these decays due to the large Cabibbo-Kobayashi-Maskawa elements, which can be perturbatively calculated without parametrization in the pQCD approach. The branching ratios of the B-c -> D-(*K-)(2)* decays can reach 10(-5) to 10(-4), which is one order of magnitude larger than that of the corresponding B-c -> D-(*K-)* decays, where heavy cancellation occurred between the penguin emission and tree annihilation diagrams. With such large branching ratios, they can very likely be observed in the ongoing LHCb experiments. We also predict a large percentage of transverse polarizations in those W-annihilation-diagram dominant B-c -> D-(*T-) decay channels. DOI: 10.1103/PhysRevD. 87.074027
资助者: National Science Foundation of China [11228512, 11235005, 11075168]; Chinese Academy of Sciences [KJCX2.YW.W10]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000317912600012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15378
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Zou, ZT,Yu, X,Lu, CD. B-c -> D-(*T-) decays in perturbative QCD approach[J]. PHYSICAL REVIEW D,2013,87(7):74027.
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