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Ratio of hadronic decay rates of J/psi and psi(2S) and the rho pi puzzle
Gu YF(顾以藩); GGu, YF; Li, XH
2001
发表期刊PHYSICAL REVIEW D
卷号63期号:11页码:114019
通讯作者Inst High Energy Phys, Beijing 100039, Peoples R China ; Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA
文章类型Article
摘要The so-called rho pi puzzle of J/psi, and psi (2S) decays is examined using the experimental data available to date. Two different approaches were taken to estimate the ratio of J/psi and psi (2S) hadronic decay rates. While one of the estimates could not yield the exact ratio of psi (2S) to J/psi inclusive hadronic decay rates, the other, based on a computation of the inclusive ggg decay rate for psi (2S)(J/psi) by subtracting other decay rates from the total decay rate, differs by two standard deviations from the naive prediction of perturbative QCD, even though its central value is nearly twice as large as what was naively expected. A comparison between this ratio, upon making corrections for specific exclusive two-body decay modes, and the corresponding experimental data confirms the puzzles in J/psi and psi (2S) decays. We find from our analysis that the exclusively reconstructed hadronic decays of the psi (2S) account for only a small fraction of its total decays, and a ratio exceeding the above estimate should be expected to occur for a considerable number of the remaining decay channels. We also show that the recent new results from the BES experiment provide crucial tests of various theoretical models proposed to explain the puzzle.
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.63.114019
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000169031600045
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240948
专题实验物理中心
作者单位中国科学院高能物理研究所
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Gu YF,GGu, YF,Li, XH. Ratio of hadronic decay rates of J/psi and psi(2S) and the rho pi puzzle[J]. PHYSICAL REVIEW D,2001,63(11):114019.
APA 顾以藩,GGu, YF,&Li, XH.(2001).Ratio of hadronic decay rates of J/psi and psi(2S) and the rho pi puzzle.PHYSICAL REVIEW D,63(11),114019.
MLA 顾以藩,et al."Ratio of hadronic decay rates of J/psi and psi(2S) and the rho pi puzzle".PHYSICAL REVIEW D 63.11(2001):114019.
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