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题名: Re-analysis of the A(1520) photoproduction reaction
作者: Xie, JJ ;  Wang, E ;  Nieves, J
刊名: PHYSICAL REVIEW C
出版日期: 2014
卷号: 89, 期号:1, 页码:15203
关键词: ELECTROMAGNETIC DECAYS ;  QUARK-MODEL ;  HYPERON ;  RESONANCES ;  BARYONS ;  STRANGENESS ;  THRESHOLD ;  EXCHANGE ;  MASSES ;  STATES
学科分类: Physics
DOI: 10.1103/PhysRevC.89.015203
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; Wang, En; Nieves, J.] Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,Inst Fis Corpuscular IFIC, E-46071 Valencia, Spain; [Xie, Ju-Jun] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
英文摘要: Based on previous studies that support the important role of the N*(2120)D-13 resonance in the gamma p -> K+ A(1520) reaction, we make a re-analysis of this A(1520) photoproduction reaction taking into account the recent CLAS differential cross-section data. In addition to the contact, t-channel (K) over bar exchange, s-channel nucleon pole, and N*(2120) [previously called N*(2080)] resonance contributions, which have been considered in previous works, we also study the u-channel A(1115) hyperon pole term. The latter mechanism has always been ignored in all theoretical analysis, which has mostly relied on the very forward K+ angular LEPS data. It is shown that when the contributions from the N*(2120) resonance and the A(1115) hyperon are taken into account, both the new CLAS and the previous LEPS data can be simultaneously described. We also show that the contribution from the u-channel A(1115) pole term produces an enhancement for large K+ angles, and it becomes more and more relevant as the photon energy increases, being essential to describe the CLAS differential cross sections at backward angles. Furthermore, we find that the new CLAS data also favor the existence of the N*(2120) resonance and that these measurements can be used to further constrain its properties.
资助者: DGI; FEDER funds [FIS2011-28853-C02-01, FIS2011-28853-C02-02]; Spanish Ingenio-Consolider Program CPAN [CSD2007-00042]; Generalitat Valenciana [PROMETEO/2009/0090]; National Natural Science Foundation of China [11105126]; European Community-Research Infrastructure Integrating Activity "Study of Strongly Interacting Matter" (HadronPhysics3) [283286]; Seventh Framework Programme of the E.U; DFG [SFB/TR 16]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000332160300009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15491
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Xie, JJ,Wang, E,Nieves, J. Re-analysis of the A(1520) photoproduction reaction[J]. PHYSICAL REVIEW C,2014,89(1):15203.
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