Neutral hidden charm pentaquark states $P_c^0(4380)$ and $P_c^0(4450)$ in $\pi^-p \to J/\psi n$ reaction

分类： 物理学 >> 核物理学 提交时间： 2016-09-14

Qi-Fang L╱ Xiao-Yun Wang Ju-Jun Xie Xu-Rong Chen Yu-Bing Dong

摘要： We investigate the neutral hidden charm pentaquark states P0c(4380) and P0c(4450) in π−p→J/ψnreaction within an effective Lagrangian approach. The background contributions for the process mainly come from t-channel π and ρ meson exchanges. The contributions of P0c(4380) and P0c(4450) states give clear peak structures in the magnitude of 1 μb at center of mass energy 4.38 GeV and 4.45 GeV in the total cross sections. Hence, this reaction may provide a new good platform to search for neutral Pc states. It is expected that our estimated total cross sections together with the angular distributions can be tested by future experiments at J-PARC.

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