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Exclusive decay of 1(--) heavy quarkonium into photon and two pions
Ma, JP; Xu, JS; Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
2001
发表期刊PHYSICS LETTERS B
ISSN0370-2693
卷号510期号:40912页码:161-166
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.
部门归属Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China
关键词Gamma
学科领域Physics
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收录类别SCI
WOS记录号WOS:000169542300018
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12722
专题理论物理所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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Ma, JP,Xu, JS,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 Ma, JP,Xu, JS,&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 Ma, JP,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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