Hidden charm mesons in nuclear matter and nuclei

TL;DR

This paper investigates the potential for $ ext{eta}_c$ and $J/\psi$ mesons to form bound states within various nuclei, based on calculations of their energies and attractive potentials in nuclear matter.

Contribution

It provides new predictions for $ ext{eta}_c$ and $J/\psi$-nucleus bound states using in-medium loop calculations of their self energies.

Findings

Bound states are predicted for $ ext{eta}_c$ and $J/\psi$ in all considered nuclei.

Attractive potentials arise from in-medium enhanced $D D^*$ and $D ar{D}$ loops.

Results suggest these mesons can form observable bound states in nuclear matter.

Abstract

Recent results for the $\eta_c$- and $J/\psi$-nucleus bound state energies for various nuclei are presented. The attractive potentials for the $\eta_c$ and $J/\psi$ mesons in the nuclear medium originate, respectively, from the in-medium enhanced $DD^{*}$ and $D\bar{D}$ loops in the $\eta_c$ and $J/\psi$ self energies. Our results suggest that the $\eta_c$ and $J/\psi$ mesons should form bound states with all the nuclei considered.