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题名: Lifetime of doubly charmed baryons
作者: Chang, Chao-Hsi ;  Li, Tong ;  Li, Xue-Qian ;  Wang, Yu-Ming
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2008
卷号: 49, 期号:4, 页码:993-1000
关键词: OSCILLATOR QUARK-MODEL ;  TO-LEADING ORDER ;  WEAK DECAYS ;  INCLUSIVE DECAYS ;  MASS DEPENDENCE ;  QCD CORRECTIONS ;  BEAUTY HADRONS ;  B-MESONS ;  TRANSITIONS ;  DIFFERENCE
学科分类: Physics
通讯作者: Chang, CH , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China
部门归属: [Chang, CH] CCAST, World Lab, Beijing 100080, Peoples R China; [Chang, CH] Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; [Li, T; Li, XQ] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China; [Wang, YM] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
英文摘要: n this work, we evaluate the lifetimes of the doubly charmed baryons Xi(+)(cc), Xi(++)(cc) and Omega(+)(cc). We carefully calculate the non-spectator contributions at the quark level, where the Cabibbo-suppressed diagrams are also included. The hadronic matrix elements are evaluated in the simple non-relativistic harmonic oscillator model. Our numerical results are generally consistent with that obtained by other authors who used the diquark model. However, all the theoretical predictions on the lifetimes are one order larger than the upper limit set by the recent SELEX measurement. This discrepancy would be clarified by the future experiment. If more accurate experiment still confirms the value of the SELEX collaboration, there must be some unknown mechanism to be explored.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000255100900038
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5550
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:
Chang, Chao-Hsi,Li, Tong,Li, Xue-Qian,et al. Lifetime of doubly charmed baryons[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2008,49(4):993-1000.
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