Study of J /Ψ three-body decays involving baryons and a pseudoscalar meson in the diquark model

Abstract

The J/Ψ decay into a baryon pair and a pseudoscalar meson is computed, for some channels, in lowest order in perturbative QCD, modeling the baryon with a quark-diquark system. We use a set of parameters that has been proposed by some authors in order to fit the proton magnetic form factor GMP, the angular distribution of protons in the processes γγ → pp, γp → γp and the width of η_c → γγ.