psi(2S) -> pi(+) pi(-) J/psi decay distributions
文献类型：期刊论文
| 作者 | BES Callaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2000 |
| 卷号 | 62期号:3 |
| 关键词 | EXCITED HEAVY QUARKONIA HADRONIC TRANSITIONS STATES ANOMALIES |
| 通讯作者 | Bai, JZ (reprint author), Inst High Energy Phys, Beijing 100039, Peoples R China. |
| 英文摘要 | Using a sample of 3.8 M psi(2S) events accumulated with the BES detector, the process psi(2S) --> pi(+) pi(r)-J/psi is studied. The angular distributions are compared with the general decay amplitude analysis of Cahn. We find that the dipion system requires some D wave amplitude, as well as S wave. On the other hand, the J/psi-(pi(+)pi(-)) relative angular momentum is consistent with being pure S wave. The decay distributions have been fit to heavy quarkonium models, including the Novikov-Shifman model. This model, which is written in terms of the parameter kappa, predicts that D wave pions should be present. We determine kappa = 0.183 +/- 0.002 +/- 0.003 based on the joint m(pi pi)-cos theta(pi)* distribution. The fraction of D wave amplitude as a function of m(pi pi) is found to decrease with increasing m(pi pi), in agreement with the model. We have also fit the Mannel-Yan model, which is another model that allows D wave pions. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000088516300005 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212061]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | BES Callaboration. psi(2S) -> pi(+) pi(-) J/psi decay distributions[J]. PHYSICAL REVIEW D,2000,62(3). |
| APA | BES Callaboration.(2000).psi(2S) -> pi(+) pi(-) J/psi decay distributions.PHYSICAL REVIEW D,62(3). |
| MLA | BES Callaboration."psi(2S) -> pi(+) pi(-) J/psi decay distributions".PHYSICAL REVIEW D 62.3(2000). |
入库方式： OAI收割
来源：高能物理研究所
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