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题名: How to reveal the exotic nature of the P-c(4450)
作者: Guo, FK;  Meissner, UG;  Wang, W;  Yang, Z
刊名: PHYSICAL REVIEW D
出版日期: 2015
卷号: 92, 期号:7, 页码:71502
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.92.071502
通讯作者: Guo, FK (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: The LHCb Collaboration announced two pentaquark-like structures in the J/psi p invariant mass distribution. We show that the current information on the narrow structure at 4.45 GeV is compatible with kinematical effects of the rescattering from chi(c1)p to J/psi p: First, it is located exactly at the chi(c1)p threshold. Second, the mass of the four-star well-established Lambda(1890) is such that a leading Landau singularity from a triangle diagram can coincidentally appear at the chi(c1)p threshold, and third, there is a narrow structure at the chi(c1)p threshold but not at the chi(c0)p and chi(c2)p thresholds. In order to check whether that structure corresponds to a real exotic resonance, one can measure the process Lambda(0)(b) -> K-chi(c1)p. If the P-c(4450) structure exists in the chi(c1)p invariant mass distribution as well, then the structure cannot be just a kinematical effect but is a real resonance; otherwise, one cannot conclude that P-c(4450) is another exotic hadron. In addition, it is also worthwhile to measure the decay Upsilon(1S) -> J/psi p (p) over bar: a narrow structure at 4.45 GeV but not at the chi(c0)p and chi(c2)p thresholds would exclude the possibility of a pure kinematical effect.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: SINGULARITIES ;  BARYONS
收录类别: SCI
项目资助者: DFG ;  NSFC [11261130311, 11165005, 11575110] ;  Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) [2015VMA076] ;  Shanghai Natural Science Foundation [11DZ2260700, 15ZR1423100] ;  Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y5KF111CJ1] ;  Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20819
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Recommended Citation:
Guo, FK,Meissner, UG,Wang, W,et al. How to reveal the exotic nature of the P-c(4450)[J]. PHYSICAL REVIEW D,2015,92(7):71502.
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