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题名: Hidden-charm pentaquark state in Lambda(0)(b) -> J/psi p pi(-) decay
作者: Wang, E ;  Chen, HX ;  Geng, LS ;  Li, DM ;  Oset, E
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 93, 期号:9, 页码:94001
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.93.094001
通讯作者: Li, DM (reprint author), Zhengzhou Univ, Dept Phys, Zhengzhou 450001, Henan, Peoples R China. ;  Chen, HX ;  Geng, LS (reprint author), Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China. ;  Chen, HX ;  Geng, LS (reprint author), Beihang Univ, Int Res Ctr Nuclei & Particles Cosmos, Beijing 100191, Peoples R China. ;  Geng, LS (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China. ;  Oset, E (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China. ;  Oset, E (reprint author), Univ Valencia, Ctr Mixto, CSIC, Inst Invest Paterna,Dept Fis Teor, Apartado 22085, Valencia 46071, Spain. ;  Oset, E (reprint author), Univ Valencia, Ctr Mixto, CSIC, Inst Invest Paterna,IFIC, Apartado 22085, Valencia 46071, Spain.
文章类型: Article
英文摘要: We study here the A(b)(0) -> J/psi p pi(-) reaction in analogy to the A(b)(0) -> J/psi pK(-) one, and we note that in both decays there is a sharp structure (dip or peak) in the J/psi p mass distribution around 4450 MeV, which is associated in the A(b)(0) -> J/psi pK(-) experiment to an exotic pentaquark baryonic state, although in J/psi p pi(-) it shows up with relatively low statistics. We analyze the A(b)(0) -> J/psi p pi(-) interaction along the same lines as the A(b)(0) -> J/psi pK(-) one, with the main difference stemming from the reduced Cabibbo strength in the former and the consideration of the pi(-)p final state interaction instead of the K(-)p one. We find that with a minimal input, introducing the pi(-)p and J/psi p interaction in S-wave with realistic interactions, and the empirical P-wave and D-wave contributions, one can accomplish a qualitative description of the pi(-)p and J/psi p mass distributions. More importantly, the peak structure followed by a dip of the experimental J/psi p mass distribution is reproduced with the same input as used to describe the data of A(b)(0) -> J/psi pK(-) reaction. The repercussion for the triangular singularity mechanism, invoked in some works to explain the pentaquark peak, is discussed.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: BARYON RESONANCES ;  DIQUARK MODEL ;  MESON ;  P-C(4450)
收录类别: SCI
项目资助者: Chinese Academy of Science (CAS) [2013T2J] ;  National Natural Science Foundation of China [11375024, 11522539, 11505158, 11475015] ;  Spanish Ministerio de Economia y Competitividad ;  European FEDER funds [FIS2011-28853-C02-01, FIS2011-28853-C02-02] ;  Generalitat Valenciana [Prometeo II-2014/068] ;  China Postdoctoral Science Foundation [2015M582197] ;  Postdoctoral Research Sponsorship in Henan Province [2015023] ;  European Community-Research Infrastructure Integrating Activity Study of Strongly Interacting Matter (acronym HadronPhysics3) under the Seventh Framework Programme of EU [283286]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21665
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, E,Chen, HX,Geng, LS,et al. Hidden-charm pentaquark state in Lambda(0)(b) -> J/psi p pi(-) decay[J]. PHYSICAL REVIEW D,2016,93(9):94001.
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