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

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来源:理论物理研究所

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