中国科学院机构知识库网格系统: B-c -> D-(*T-) decays in perturbative QCD approach

B-c -> D-(*T-) decays in perturbative QCD approach

文献类型：期刊论文


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
ISSN号	1550-7998
通讯作者	Zou, ZT (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, 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
学科主题	Physics
收录类别	SCI
资助信息	National Science Foundation of China [11228512, 11235005, 11075168]; Chinese Academy of Sciences [KJCX2.YW.W10]
原文出处	http://dx.doi.org/10.1103/PhysRevD.87.074027
语种	英语
WOS记录号	WOS:000317912600012
公开日期	2014-04-25
源URL	[http://ir.itp.ac.cn/handle/311006/15378]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Zou, ZT,Yu, X,Lu, CD. B-c -> D-(*T-) decays in perturbative QCD approach[J]. PHYSICAL REVIEW D,2013,87(7):74027.
APA	Zou, ZT,Yu, X,&Lu, CD.(2013).B-c -> D-(*T-) decays in perturbative QCD approach.PHYSICAL REVIEW D,87(7),74027.
MLA	Zou, ZT,et al."B-c -> D-(*T-) decays in perturbative QCD approach".PHYSICAL REVIEW D 87.7(2013):74027.

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来源：理论物理研究所

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B-c -> D-(*T-) decays in perturbative QCD approach

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