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题名: Analysis of recent CLAS data on Sigma*(1385) photoproduction off a neutron target
作者: Wang, XY ;  He, J ;  Haberzettl, H
刊名: PHYSICAL REVIEW C
出版日期: 2016
卷号: 93, 期号:4, 页码:45204
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevC.93.045204
通讯作者: He, J (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China. ;  He, J (reprint author), Chinese Acad Sci, Inst Modern Phys, Res Ctr Hadron & CSR Phys, Lanzhou 730000, Peoples R China. ;  He, J (reprint author), Lanzhou Univ, Lanzhou 730000, Peoples R China. ;  He, J (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: Based on recent experimental data obtained by the CLAS Collaboration, the Sigma(1385) photoproduction off a neutron target at laboratory photon energies E-gamma up to 2.5 GeV is investigated in an effective Lagrangian approach including s-, u-, and t-channel Born-term contributions. The present calculation does not take into account any explicit s-channel baryon-resonance contributions; however, in the spirit of duality, we include t-channel exchanges of mesonic Regge trajectories. The onset of the Regge regime is controlled by smoothly interpolating between Feynman-type single-meson exchanges and full-fledged Regge-trajectory exchanges. Gauge invariance broken by the Regge treatment is fully restored by introducing contact-type interaction currents that result from the implementation of local gauge invariance in terms of generalized Ward-Takahashi identities. The cross sections for the gamma n -> K (+) Sigma*(1385)(-) reaction are calculated and compared with experimental results from the CLAS and LEPS collaborations. Despite its simplicity, the present theoretical approach provides a good description of the main features of the data. However, the parameters fitted to the data show that the gauge-invariance-restoring contact term plays a large role, which may point to large contributions from final-state interactions.
类目[WOS]: Physics, Nuclear
关键词[WOS]: PION
收录类别: SCI
项目资助者: Major State Basic Research Development Program in China [2014CB845405] ;  National Natural Science Foundation of China [11275235]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21692
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Wang, XY,He, J,Haberzettl, H. Analysis of recent CLAS data on Sigma*(1385) photoproduction off a neutron target[J]. PHYSICAL REVIEW C,2016,93(4):45204.
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