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题名: Resonance on top of thresholds: The Lambda(c) (2595)(+) as an extremely fine-tuned state
作者: Guo, ZH ;  Oller, JA
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 93, 期号:5, 页码:54014
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.93.054014
通讯作者: Guo, ZH (reprint author), Hebei Normal Univ, Dept Phys, Shijiazhuang 050024, Peoples R China. ;  Guo, ZH (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China. ;  Oller, JA (reprint author), Univ Murcia, Dept Fis, E-30071 Murcia, Spain.
文章类型: Article
英文摘要: A dedicated study of the pi Sigma(c) scattering around its threshold is carried out in this work to probe the nature of Lambda(c)(2595)(+). We first demonstrate that the effective range expansion approach fails to work near the Lambda(c)(2595)(+) pole position, due to the presence of a nearby Castillejo-Dalitz-Dyson (CDD) pole around the pi Sigma(c) thresholds. We then develop a general framework to properly handle the situation with a CDD pole accompanied by nearby thresholds, which is first elaborated for the single-channel case and then generalized to the coupled-channel study. The isospin-breaking effects of the three pi Sigma(c) channels with different thresholds are specially taken into account in our study. The finite-width effects from the Sigma(c) baryons are considered and found to be relevant to give the Lambda(c)(2595)(+) width fully compatible with its experimental value. Through the compositeness analysis, our robust conclusion is that the pi(0)Sigma(+)(c) component is subdominant inside the Lambda(c)(2595)(+).
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: EFFECTIVE-FIELD THEORY ;  NUCLEAR-FORCES ;  SCATTERING EQUATION ;  CHIRAL DYNAMICS ;  BARYON STATES ;  CHARM ;  PARTICLES
收录类别: SCI
项目资助者: MINECO (Spain) ;  ERDF (European Commission) [FPA2013-40483-P] ;  Spanish Excellence Network on Hadronic Physics [FIS2014-057026-0REDT] ;  National Natural Science Foundation of China (NSFC) [11575052, 11105038] ;  Natural Science Foundation of Hebei Province [A2015205205] ;  Education Department of Hebei Province [YQ2014034] ;  Department of Human Resources and Social Security of Hebei Province [C201400323]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21737
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Guo, ZH,Oller, JA. Resonance on top of thresholds: The Lambda(c) (2595)(+) as an extremely fine-tuned state[J]. PHYSICAL REVIEW D,2016,93(5):54014.
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