The Z(b)(10610) and Zb(10650) as axial-vector tetraquark states in the QCD sum rules
Wang, ZG; 黄涛(理); Huang, T
刊名NUCLEAR PHYSICS A
2014
卷号930页码:63-85
关键词Tetraquark state QCD sum rules
学科分类Physics
DOI10.1016/j.nuclphysa.2014.08.084
英文摘要In this article, we study the axial-vector mesons Z(b)(10 610) and Z(b)(10 650) with the C gamma(mu)-C gamma(5) type and C gamma(mu)-C gamma(nu) type interpolating currents, respectively, by carrying out the operator product expansion to the vacuum condensates up to dimension 10. In calculations, we explore the energy scale dependence of the QCD spectral densities of the hidden bottom tetraquark states in detail for the first time, and suggest a formula mu =root M-X/Y/Z(2)-(2M(b))(2) with the effective mass M-b = 5.13 GeV to determine the energy scales. The numerical results favor assigning the Z(b)(10610) and 4(10 650) as the C gamma(mu)-C gamma(5) type and C gamma(mu)-C gamma(nu) type hidden bottom tetraquark states, respectively. We obtain the mass of the J(PC) = 1(++) hidden bottom tetraquark state as 'a byproduct, which can be compared to the experimental data in the futures. Furthermore, we study the strong decays Z(b)(+/-) (10 610) -> Upsilon pi(+/-), eta(b)rho(+/-) with the three-point QCD sum rules, the decay widths also support assigning the Z(b)(10 610) as the C gamma(mu)-C gamma(5) type hidden bottom tetraquark state. (C) 2014 Elsevier B.V. All rights reserved.
收录类别SCI
WOS记录号WOS:000343340100005
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被引频次:35[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225229
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_理论物理室
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Wang, ZG,Huang T. The Z(b)(10610) and Zb(10650) as axial-vector tetraquark states in the QCD sum rules[J]. NUCLEAR PHYSICS A,2014,930:63-85.
APA Wang, ZG,&黄涛.(2014).The Z(b)(10610) and Zb(10650) as axial-vector tetraquark states in the QCD sum rules.NUCLEAR PHYSICS A,930,63-85.
MLA Wang, ZG,et al."The Z(b)(10610) and Zb(10650) as axial-vector tetraquark states in the QCD sum rules".NUCLEAR PHYSICS A 930(2014):63-85.
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