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ZHOU, HY; KUANG, YP; ZHOU, HY , TSING HUA UNIV,DEPT PHYS,BEIJING 100084,PEOPLES R CHINA. | |
COUPLED-CHANNEL EFFECTS IN HADRONIC TRANSITIONS IN HEAVY-QUARKONIUM SYSTEMS | |
发表期刊 | PHYSICAL REVIEW D
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关键词 | Quantum Chromodynamics Bbbar Quarkonium Decay States Model Upsilon-(3s) Spectra Ccbar Mass |
摘要 | A systematic calculation of the coupled-channel effects in hadronic transitions in the ccBAR and bbBAR systems is given. The unitarized quark model based on the 3P0 quark-pair-creation mechanism is adopted as the coupled-channel model. The emitted pions can now be produced both from the conventional Okubo-Zweig-Iizuka- (OZI) forbidden process described by QCD multipole-gluon emissions and from the light-quark loop through an OZI-allowed process described by the quark-pair-creation model. There is interference between the two kinds of transition amplitudes. Taking the experimental values of GAMMA(psi' --> J/psi-pi-pi) and d-GAMMA(psi' --> J/psi-pi-pi)/dM(pi-pi) as inputs to determine the two unknown parameters in the theory, we predict the transition rates and M(pi-pi) distributions in the bbBAR system. The obtained rates for UPSILON' --> UPSILON-pi-pi, UPSILON" --> UPSILON-pi-pi, UPSILON" --> UPSILON'pi-pi and the distribution d-GAMMA(UPSILON' --> UPSILON-pi-pi)/dM(pi-pi) are in good agreement with the experiments. For d-GAMMA(UPSILON" --> UPSILON-pi-pi)/dM(pi-pi), the present theory does give a bigger low-M(pi-pi) distribution than the pure QCD multipole expansion does, but it is still too small to fit the CLEO data. |
1991 | |
ISSN | 0556-2821 |
卷号 | 44期号:3页码:756-769 |
学科领域 | Physics |
收录类别 | SCI |
文献类型 | 期刊论文 |
条目标识符 | http://ir.itp.ac.cn/handle/311006/11297 |
专题 | 理论物理所科研产出_SCI论文 |
通讯作者 | ZHOU, HY , TSING HUA UNIV,DEPT PHYS,BEIJING 100084,PEOPLES R CHINA. |
推荐引用方式 GB/T 7714 | ZHOU, HY,KUANG, YP,ZHOU, HY , TSING HUA UNIV,DEPT PHYS,BEIJING 100084,PEOPLES R CHINA.. COUPLED-CHANNEL EFFECTS IN HADRONIC TRANSITIONS IN HEAVY-QUARKONIUM SYSTEMS[J]. PHYSICAL REVIEW D,1991,44(3):756-769. |
APA | ZHOU, HY,KUANG, YP,&ZHOU, HY , TSING HUA UNIV,DEPT PHYS,BEIJING 100084,PEOPLES R CHINA..(1991).COUPLED-CHANNEL EFFECTS IN HADRONIC TRANSITIONS IN HEAVY-QUARKONIUM SYSTEMS.PHYSICAL REVIEW D,44(3),756-769. |
MLA | ZHOU, HY,et al."COUPLED-CHANNEL EFFECTS IN HADRONIC TRANSITIONS IN HEAVY-QUARKONIUM SYSTEMS".PHYSICAL REVIEW D 44.3(1991):756-769. |
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