Enhanced production of $\psi (2S)$ mesons in heavy ion collisions

Abstract

We study the production of a $\psi (2S)$ meson in heavy ion collisions. We 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 anti-charm 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.

5 pages, 1 figure

References in corpus (4)

• J/psi Production vs Centrality, Transverse Momentum, and Rapidity in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Color Screening Melts Quarkonium
• Evidence for charmonium generation at the phase boundary in ultra-relativistic nuclear collisions
• Measurement of prompt psi(2S) to J/psi yield ratios in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV

Cited by in corpus (1)

• Angular Momentum Eigenstates of the Isotropic 3-D Harmonic Oscillator: Phase-Space Distributions and Coalescence Probabilities