A study of the Roper resonance as a hybrid state from J/psi decays
文献类型：期刊论文
| 作者 | Ping RG(平荣刚) ; Jiang HQ(姜焕清); Zou BS(邹冰松); Ping, RG; Chiang, HC; Zou, BS
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| 刊名 | NUCLEAR PHYSICS A
 |
| 出版日期 | 2004 |
| 卷号 | 743期号:1-3页码:#REF! |
| 关键词 | Roper resonance structure hybrid state J/psi |
| 通讯作者 | Ping, RG (reprint author), CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China. |
| 英文摘要 | The structure of the Roper resonance as a hybrid baryon is investigated through studying the transitional amplitudes in J/psi --> (p) over barN*, (N) over bar *N* decays. We begin with perturbative QCD to describe the dynamical process for the J/psi --> 3 (q) over bar + 3q decay to the lowest order of alpha(s), and by extending the modified quark creation model to the J/psi energy region to describe the J/psi --> 3 (q) over bar + 3q + g process. The nonperturbative effects are incorporated by a simple quark model of baryons to evaluate the angular distribution parameters and decay widths for the processes J/psi --> (p) over barN*, (N) over bar *N*. From fitting the decay width of J/psi --> gammap (p) over bar to the experimental data, we extract the quark-pair creation strength g(I) = 15.40 GeV. Our numerical results for J/psi --> (p) over barN*, (N) over bar *N* decays show that the branching ratios for these decays are quite different if the Roper resonance is assumed to be a common 3q state or a pure hybrid state. For testing its mixing properties, we present a scheme to construct the Roper wave function by mixing \qqqg> state with a normal \qqq,2s> state. Under this picture, the ratios of the decay widths to that of the J/psi --> p (p) over bar decay are re-evaluated versus the mixing parameter. A test of the hybrid nature of the Roper resonance in J/psi decays is discussed. (C) 2004 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear |
| 收录类别 | SCI |
| WOS记录号 | WOS:000224229300006 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/226509]  |
| 专题 | 高能物理研究所_理论物理室 高能物理研究所_实验物理中心 |
| 推荐引用方式 GB/T 7714 | Ping RG,Jiang HQ,Zou BS,et al. A study of the Roper resonance as a hybrid state from J/psi decays[J]. NUCLEAR PHYSICS A,2004,743(1-3):#REF!. |
| APA | 平荣刚,姜焕清,邹冰松,Ping, RG,Chiang, HC,&Zou, BS.(2004).A study of the Roper resonance as a hybrid state from J/psi decays.NUCLEAR PHYSICS A,743(1-3),#REF!. |
| MLA | 平荣刚,et al."A study of the Roper resonance as a hybrid state from J/psi decays".NUCLEAR PHYSICS A 743.1-3(2004):#REF!. |
入库方式： OAI收割
来源：高能物理研究所
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