Study of the η′→Ve+e− decay with hidden local symmetry modelSupported by National Natural Science Foundation of China (11147008, 11275057, U1332103, U1232101) and Program for Science and Technology Innovation Talents in Universities of Henan Province (2012HASTIT030)
Yue-Ling Yang (Institute of Particle and Nuclear Physics, Henan Normal University, Xinxiang 453007, China); Jin-Shu Huang (College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China); Gong-Ru Lu (Institute of Particle and Nuclear Physics, Henan Normal University, Xinxiang 453007, China)
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 eV and branching ratio β(η′→ωe+e−) ≈ 2×10−4, and Γ(η′→ρe+e−) ≈ 10Γ(η′→ωe+e−) and β(η′→ρe+e−) ≈ 10β(η′→ωe+e−). The maximum position of the dilepton distribution is me+e− ≈1.33 MeV. These decays are measurable with the advent of high statistic η′ experiments.
