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The Z(b)(10610) and Zb(10650) as axial-vector tetraquark states in the QCD sum rules
Wang, ZG; 黄涛(理); Huang, T
2014
Source PublicationNUCLEAR PHYSICS A
ISSN0375-9474
EISSN1873-1554
Volume930Pages:63-85
AbstractIn 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.
KeywordTetraquark state QCD sum rules
Subject AreaPhysics
DOI10.1016/j.nuclphysa.2014.08.084
Indexed BySCI ; INSPIREHEP ; ADS
Language英语
WOS IDWOS:000343340100005
ADS Bibcode2014NuPhA.930...63W
ADS URLhttps://ui.adsabs.harvard.edu/abs/2014NuPhA.930...63W
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2014NuPhA.930...63W/citations
inspireid1268643
inspireURLhttps://inspirehep.net/literature/1268643
Citation statistics
Cited Times:78 [INSPIRE]
Cited Times:76 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/225229
Collection理论物理室
Recommended Citation
GB/T 7714
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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