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题名: Coupling constant for Lambda(1405)(K)over-bar N
作者: Xie, JJ ;  Liu, BC ;  An, CS
刊名: PHYSICAL REVIEW C
出版日期: 2013
卷号: 88, 期号:1, 页码:15203
关键词: SU(3) SYMMETRY ;  RESONANCES ;  SCATTERING ;  NUCLEON ;  LAMBDA ;  STATE ;  MODEL ;  ETA ;  PP
学科分类: Physics
通讯作者: Xie, JJ (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.
部门归属: [Xie, Ju-Jun] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China; [Xie, Ju-Jun; Liu, Bo-Chao] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Liu, Bo-Chao] Xi An Jiao Tong Univ, Dept Appl Phys, Xian 710049, Shanxi, Peoples R China; [An, Chun-Sheng] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [An, Chun-Sheng] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
英文摘要: The value of the Lambda(1405)(K) over bar N coupling constant g(Lambda(1405)(K) over bar) (N) is obtained by fitting it to the experimental data on the total cross sections of the K- p -> pi(0)Sigma(0) reaction. On the basis of an effective Lagrangian approach and isobar model, we show that the value vertical bar g(Lambda(1405)(K) over bar) (N)vertical bar = 1.51 +/- 0.10 could be extracted from the available experimental data by assuming that the s-channel Lambda(1405) resonance plays a dominant role, whereas, the background contributions from the s-channel Lambda(1115), t-channel K*, and u-channel nucleon pole processes are small and can be neglected. However, the u-channel nucleon pole diagram may also give an important contribution in the present calculations. After the background contributions are taken into account, the above value of g(Lambda(1405)(K) over bar) (N) is reduced to vertical bar g(Lambda(1405)(K) over bar) (N)vertical bar = 0.77 +/- 0.07, which is not supported by the previous calculations and the recent CLAS measurements. The theoretical calculations on differential cross sections are also presented, which can be checked by future experiments.
资助者: National Natural Science Foundation of China [11105126, 10905046, 11205164]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000321999100006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15323
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Xie, JJ,Liu, BC,An, CS. Coupling constant for Lambda(1405)(K)over-bar N[J]. PHYSICAL REVIEW C,2013,88(1):15203.
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