| Properties of the coupling constants of J/ψ→VP decays |
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| 作者姓名： | 黄金书 孙俊峰 鲁公儒 李海波 |
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| 作者单位： | 1. College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China;;2. College of Physics and Electronic Engineering, Henan Normal University, Xinxiang 453007, China;;3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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| 摘 要： | Based on the branching fractions of J/ψ→VP from different experiments, we investigate the properties of the coupling constants of J/ψ→VP decays using a model-dependent approach. We find that the octet coupling constant, g8, of strong interaction is about twice larger than that of the singlet coupling constant g1; the electromag- netic breaking parameters gEi are larger than the mass breaking parameters gMi, moreover, the three parameters of the electromagnetic effect are about equal, but the three parameters of the mass effect are obviously different and their uncertainties are also large; and the phase angle between strong and electromagnetic interactions is in the range of 70°-80°. It deepens our understanding of the coupling constant of J/ψ→VP decays.
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| 关 键 词： | J/ψ decay mixing angle coupling constant fit |
| 收稿时间： | 2012-09-10 |
| 修稿时间： | 2012-10-08 |
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