Role of the possible Sigma*(1/2(-)) state in the Lambda p -> Lambda p pi(0) reaction

doi:10.1103/PhysRevC.90.055204

CORC > 兰州大学 > 兰州大学 > 学院待认领 > 期刊论文

	*Role of the possible Sigma(1/2(-)) state in the Lambda p -> Lambda p pi(0) reaction**
	Xie, JJ; Wu, JJ; Zou, BS; Xie, JJ (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.
刊名	PHYSICAL REVIEW C
	2014-11-12
卷号	90 期号:5
ISSN号	0556-2813
DOI	10.1103/PhysRevC.90.055204
文献子类	Article
英文摘要	The Lambda p -> Lambda p pi(0) reaction near threshold is studied within an effective Lagrangian method. The production process is described by single-pion and single-kaon exchange. In addition to the role played by the Sigma(1385) resonance of spin-parity J(P) = 3/2(+), the effects of a newly proposed Sigma (J(P) = 1/2(-)) state with mass and width around 1380 MeV and 120 MeV are investigated. We show that our model leads to a good description of the experimental data on the total cross section of the Lambda p -> Lambda p pi(0) reaction by including the contributions from the possible Sigma* (1/2(-)) state. However, the theoretical calculations by considering only the Sigma(1385) resonance fail to reproduce the experimental data, especially for the enhancement close to the reaction threshold. On the other hand, it is found that the single-pion exchange is dominant. Furthermore, we also demonstrate that the angular distributions provide direct information of this reaction, hence could be useful for the investigation of the existence of the Sigma(1/2(-)) state and may be tested by future experiments.
学科主题	Physics
出版地	COLLEGE PK
资助项目	国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划（973计划） ; 美国能源部项目
项目编号	National Natural Science Foundation of China [11105126, 11035006, 11121092, 11261130311] ; Chinese Academy of Sciences [KJCX2-EW-N01] ; Ministry of Science and Technology of China [2009CB825200] ; U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC02-06CH11357]
语种	英语
WOS记录号	WOS:000355194400003
资助机构	NSFC ; MOST ; US DOE
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/178471]
专题	学院待认领_期刊论文
通讯作者	Xie, JJ (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Xie, JJ,Wu, JJ,Zou, BS,et al. Role of the possible Sigma*(1/2(-)) state in the Lambda p -> Lambda p pi(0) reaction[J]. PHYSICAL REVIEW C,2014,90(5).
APA	Xie, JJ,Wu, JJ,Zou, BS,&Xie, JJ .(2014).Role of the possible Sigma*(1/2(-)) state in the Lambda p -> Lambda p pi(0) reaction.PHYSICAL REVIEW C,90(5).
MLA	Xie, JJ,et al."Role of the possible Sigma*(1/2(-)) state in the Lambda p -> Lambda p pi(0) reaction".PHYSICAL REVIEW C 90.5(2014).