Study of the η’→Ve~+e~- decay with hidden local symmetry model |
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作者姓名: | 杨悦玲 黄金书 鲁公儒 |
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作者单位: | Institute of Particle and Nuclear Physics, Henan Normal University;College of Physics and Electronic Engineering, Nanyang Normal University |
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基金项目: | Supported by National Natural Science Foundation of China(11147008,11275057,U1332103,U1232101);Program for Science and Technology Innovation Talents in Universities of Henan Province(2012HASTIT030) |
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摘 要: | Within the hidden local symmetry framework, the Dalitz decay η→Ve+e-is studied with the vector meson dominance model. It is found that the partial width Γ(η→ωe+e-)≈40 e V and branching ratio B(η→ωe+e-)≈2×10-4, and Γ(η→ρe+e-)≈10Γ(η→ωe+e-) and B(η→ρe+e-)≈10B(η→ωe+e-). The maximum position of the dilepton distribution is m e+e-≈1.33 Me V. These decays are measurable with the advent of high statistic ηexperiments.
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关 键 词: | η’ meson VMD model decay width branching ratio |
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