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题名: Effect of Z(b) states gamma(3S) -> gamma(1S) pi pi decays
作者: Chen, YH ;  Daub, JT ;  Guo, FK ;  Kubis, B ;  Meissner, UG ;  Zou, BS
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 93, 期号:3, 页码:34030
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.93.034030
通讯作者: Chen, YH (reprint author), Univ Bonn, Helmholtz Inst Strahlen & Kernphys Theorie, D-53115 Bonn, Germany. ;  Chen, YH (reprint author), Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany.
文章类型: Article
英文摘要: Within the framework of dispersion theory, we analyze the dipion transitions between the lightest gamma(nS) -> gamma(nS)pi pi states, with m < n <= 3. In particular, we consider the possible effects of two intermediate bottomoniumlike exotic states Z(b) (10610) and Z(b)(10650). The pi pi rescattering effects are taken into account in a model-independent way using dispersion theory. We confirm that matching the dispersive representation to the leading chiral amplitude alone cannot reproduce the peculiar two-peak pi pi mass spectrum of the gamma(3S) -> gamma(1S)pi pi. The existence of the bottomoniumlike Zb states can naturally explain this anomaly. We also point out the necessity of a proper extraction of the coupling strengths for the Z(b) states gamma(nS)pi, which is only possible if a Flatte- like parametrization is used in the data analysis for the Z(b) states.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: SIGMA-MESON PRODUCTION ;  HADRONIC TRANSITIONS ;  CHIRAL-SYMMETRY ;  HEAVY QUARKONIA ;  UPSILON ;  CHARMONIUM ;  RESONANCE ;  EQUATIONS ;  SPECTRA ;  SYSTEMS
收录类别: SCI
项目资助者: NSFC [11261130311, 11165005] ;  DFG through funds provided ;  Thousand Talents Plan for Young Professionals ;  Chinese Academy of Sciences President's International Fellowship Initiative [2015VMA076]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21760
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Chen, YH,Daub, JT,Guo, FK,et al. Effect of Z(b) states gamma(3S) -> gamma(1S) pi pi decays[J]. PHYSICAL REVIEW D,2016,93(3):34030.
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