Exclusive decay of 1(--) heavy quarkonium into photon and two pions
文献类型:期刊论文
作者 | Xu, JS; Ma, JP; Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China. |
刊名 | PHYSICS LETTERS B |
出版日期 | 2001 |
卷号 | 510期号:40912页码:161-166 |
ISSN号 | 0370-2693 |
关键词 | Gamma |
英文摘要 | We study the exclusive decay of 1(--) heavy quarkonium into one photon and two pions in the kinematic region, where the two-pion system has a invariant mass which is much smaller than the mass of heavy quarkonium. Neglecting effects suppressed by the inverse of the heavy quark mass, the decay amplitude can be factorized, in which the nonperturbative effect related to heavy quarkonium is represented by a non-relativistic QCD matrix element, and that related to the two pions is represented by a distribution amplitude of two gluons in the isoscalar pion pair. By taking the asymptotic form for the distribution amplitude and by using chiral perturbative theory we are able to obtain numerical predictions for the decay. Numerical results show that the decay of J/psi can be observed at BEPC and at CESR. Experiment observation of this process in this kinematic region at BEPC and CESR can provide information about how gluons are converted into the two pions and may supply a unique approach to study I = 0 s-wave pi pi scattering. (C) 2001 Published by Elsevier Science B.V. |
学科主题 | Physics |
URL标识 | 查看原文 |
WOS记录号 | WOS:000169542300018 |
公开日期 | 2012-08-29 |
源URL | [http://ir.itp.ac.cn/handle/311006/12722] |
专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
通讯作者 | Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China. |
推荐引用方式 GB/T 7714 | Xu, JS,Ma, JP,Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.. Exclusive decay of 1(--) heavy quarkonium into photon and two pions[J]. PHYSICS LETTERS B,2001,510(40912):161-166. |
APA | Xu, JS,Ma, JP,&Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2001).Exclusive decay of 1(--) heavy quarkonium into photon and two pions.PHYSICS LETTERS B,510(40912),161-166. |
MLA | Xu, JS,et al."Exclusive decay of 1(--) heavy quarkonium into photon and two pions".PHYSICS LETTERS B 510.40912(2001):161-166. |
入库方式: OAI收割
来源:理论物理研究所
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