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题名: Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrization for line shapes
作者: Guo, FK ;  Hanhart, C ;  Kalashnikova, YS ;  Matuschek, P ;  Mizuk, RV ;  Nefediev, AV ;  Wang, Q ;  Wynen, JL
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 93, 期号:7, 页码:74031
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.93.074031
通讯作者: Guo, FK (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China. ;  Guo, FK (reprint author), Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany. ;  Guo, FK (reprint author), Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany.
文章类型: Article
英文摘要: We propose a practical parametrization for the line shapes of near-threshold states compatible with all requirements of unitarity and analyticity. The coupled-channel system underlying the proposed parametrization includes bare poles and an arbitrary number of elastic and inelastic channels treated fully nonperturbatively. The resulting formulas are general enough to be used for a simultaneous analysis of the data in all available production and decay channels of the (system of) state(s) under consideration for a quite wide class of reactions. As an example, we fit the experimental data currently available for several decay channels for the charged Z(b)((r)) states in the spectrum of bottomonia and find a good overall description of the data. We find the present data to be consistent with the Z(b)(10610) as a virtual state and with the Z(b)(10650) as a resonance, both residing very close to the B (B) over bar* and B*(B) over bar* threshold, respectively.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: Z(B) STATES ;  X(3872) ;  PARTICLES
收录类别: SCI
项目资助者: DFG ;  NSFC [11261130311] ;  Russian Science Foundation [15-12-30014] ;  Thousand Talents Plan for Young Professionals
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21682
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, FK,Hanhart, C,Kalashnikova, YS,et al. Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrization for line shapes[J]. PHYSICAL REVIEW D,2016,93(7):74031.
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