Dissociation cross sections of ψ(3770), ψ(4040), ψ(4160), and ψ(4415) mesons with nucleons

Abstract

We study the dissociation of ψ(3770), ψ(4040), ψ(4160), and ψ(4415) mesons in collision with nucleons, which takes place in high-energy proton-nucleus collisions. The quark interchange between a nucleon and a cc¯ meson leads to the dissociation of the cc¯ meson. We consider the reactions: pR→Λc+D¯0 , pR→Λc+D¯*0 , pR→Σc++D− , pR→Σc++D*− , pR→Σc+D¯0 , pR→Σc+D¯*0 , pR→Σc*++D− , pR→Σc*++D*− , pR→Σc*+D¯0 , and pR→Σc*+D¯*0 , where R stands for ψ(3770), ψ(4040), ψ(4160), or ψ(4415). A reaction of a neutron and a cc¯ meson corresponds to a reaction of a proton and the cc¯ meson by replacing the up quark with the down quark and vice versa. Transition-amplitude formulas are derived from the S-matrix element. Unpolarized cross sections are calculated with the transition amplitudes for scattering in the prior form and in the post form. The cross sections relate to nodes in the radial wave functions of ψ(3770), ψ(4040), ψ(4160), and ψ(4415) mesons.