Strong decays of PψN^(4312)+ to J/ψ(η_c)p and D¯ ^(∗)Λ _c within the Bethe-Salpeter framework

Based on the effective Lagrangian in the heavy quark limit, we calculate the one-boson-exchange interaction kernel of PψN(4312)+ as the D¯ Σ _c molecular state in isospin- 12 . We present the Bethe-Salpeter equation and wave function for the constituent particles to be a (pseudo)scalar meson and a 12 baryon. By solving the Bethe-Salpeter equation, we obtain PψN(4312)+ as the D¯ Σ _c molecular state with J ^P = (12)− . Combining the effective Lagrangian and the obtained BS wave function, the partial decay widths of PψN(4312)+ to J/ψp, η_c p, D¯∗0Λc+ and D¯0Λc+ are calculated to be 0.17, 0.085, 8.8, and 0.026 MeV, respectively, which are roughly consistent with the LHCb experimental measurements and some other theoretical researches. The obtain results indicate the fraction of D¯∗0Λc+ channel amounts to ~ 90% of PψN(4312)+ , and is a highly promising channel to be discovered in the near future experiments. Our results favor the interpretation of PψN(4312)+ as the D¯ Σ _c molecular state with J ^P = (12)− and isospin I = 12 .