The Z(b)(10610) and Zb(10650) as axial-vector tetraquark states in the QCD sum rules
文献类型：期刊论文
| 作者 | Wang, ZG; 黄涛(理); Huang, T
|
| 刊名 | NUCLEAR PHYSICS A
 |
| 出版日期 | 2014 |
| 卷号 | 930页码:63-85 |
| 关键词 | Tetraquark state QCD sum rules |
| 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. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| WOS记录号 | WOS:000343340100005 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/225229]  |
| 专题 | 高能物理研究所_理论物理室 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：高能物理研究所
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