Enhanced production of ψ(2S) mesons in heavy ion collisions

초록

I study the production of a psi(2S) meson in heavy ion collisions. I evaluate Wigner functions for the psi(2S) meson using both Gaussian and Coulomb wave functions, and investigate the wave function dependence in the psi(2S) meson production by recombination of charm and anticharm quarks. The enhanced transverse momentum distribution of psi(2S) mesons compared to that of J/psi mesons, originated from wave function distributions of the psi(2S) and J/psi meson in momentum space, provides a plausible explanation for the recent measurement of the nuclear modification factor ratio between the psi(2S) and J/psi meson.

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