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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
Source PublicationPHYSICS LETTERS B
KeywordGamma
AbstractWe 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.
2001
ISSN0370-2693
Volume510Issue:40912Pages:161-166
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/12722
Collection理论物理所科研产出_SCI论文
Corresponding AuthorMa, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
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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