$\eta_{c}$-nucleus bound states

TL;DR

This paper calculates the energies of $ta_c$-nucleus bound states using a quark-meson coupling model, predicting that $ta_c$ mesons can form bound states with various nuclei due to medium modifications.

Contribution

It introduces a novel calculation of $ta_c$-nucleus bound states incorporating medium-modified meson masses within the QMC model.

Findings

$ta_c$ can form bound states with all nuclei studied.

Medium modifications enhance the $D$ and $D^{*}$ meson masses, affecting binding energies.

Attractive potentials are driven by in-medium $DD^{*}$ loops.

Abstract

$\eta_c$-nucleus bound state energies are calculated for various nuclei. Essential input for the calculations, namely the medium-modified $D$ and $D^{*}$ meson masses, as well as the density distributions in nuclei, are calculated within the quark-meson coupling (QMC) model. The attractive potentials for the $\eta_c$ meson in the nuclear medium originate from the in-medium enhanced $DD^{*}$ loops in the $\eta_c$ self-energy. Our results suggest that the $\eta_c$ meson should form bound states with all the nuclei considered.