中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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
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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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