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题名: Reanalysis of the four-quark operators relevant to the Lambda(b) lifetime from the QCD sum rule
作者: Huang, CS ;  Liu, C ;  Zhu, SL
刊名: PHYSICAL REVIEW D
出版日期: 2000
卷号: 61, 期号:5, 页码:-
关键词: HEAVY FLAVOR DECAYS ;  B-MESON LIFETIMES ;  TO-LEADING ORDER ;  SEMILEPTONIC DECAY ;  4-QUARK OPERATORS ;  GLUON CONDENSATE ;  FORM-FACTORS ;  WEAK DECAYS ;  ALPHA(S) ;  BEAUTY
学科分类: Physics
通讯作者: Huang, CS , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Korea Inst Adv Study, Seoul 130012, South Korea
英文摘要: The Lambda(b) matrix element of the four-quark operator relevant to its lifetime is reanalyzed by the QCD sum rule method. The new ingredients introduced are that (1) more vacuum condensates are considered, (2) a different quark-hadron duality is adopted, and (3) the possible deviation from the vacuum saturation assumption for the four quark condensates is considered. With kappa(1) = 4 the related hadronic parameter r is calculated to be (3.6 +/- 0.9), and the lifetime ratio tau(Lambda(b))/tau(B-0) = (0.83 +/- 0.04), which is consistent with experimental data.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000085685600018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13011
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Huang, CS,Liu, C,Zhu, SL. Reanalysis of the four-quark operators relevant to the Lambda(b) lifetime from the QCD sum rule[J]. PHYSICAL REVIEW D,2000,61(5):-.
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