Re-analysis of the A(1520) photoproduction reaction

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	Re-analysis of the A(1520) photoproduction reaction
	Xie, JJ ; Wang, E ; Nieves, J
刊名	PHYSICAL REVIEW C
	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
ISSN号	0556-2813
通讯作者	Xie, JJ (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, 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.
学科主题	Physics
收录类别	SCI
资助信息	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]
原文出处	http://dx.doi.org/10.1103/PhysRevC.89.015203
语种	英语
WOS记录号	WOS:000332160300009
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15491]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Xie, JJ,Wang, E,Nieves, J. Re-analysis of the A(1520) photoproduction reaction[J]. PHYSICAL REVIEW C,2014,89(1):15203.
APA	Xie, JJ,Wang, E,&Nieves, J.(2014).Re-analysis of the A(1520) photoproduction reaction.PHYSICAL REVIEW C,89(1),15203.
MLA	Xie, JJ,et al."Re-analysis of the A(1520) photoproduction reaction".PHYSICAL REVIEW C 89.1(2014):15203.