Heavy-heavy and heavy-light mesons in cold nuclear matter

TL;DR

This paper reviews how heavy-heavy and heavy-light mesons' effective masses change in cold nuclear matter, using a combined quark-meson coupling model and effective Lagrangian, highlighting implications for chiral symmetry and presenting new results for Bc-nucleus bound states.

Contribution

It introduces a comprehensive review of meson mass modifications in nuclear matter with new findings on Bc-nucleus bound states, combining QMC model and effective Lagrangian approaches.

Findings

Meson effective masses are modified in nuclear matter.

Meson-nucleus bound states can reveal chiral symmetry properties.

New results on Bc-nucleus bound states are presented.

Abstract

We review the in-medium modifications of effective masses (Lorentz scalar potentials or phenomenon of mass shift) of heavy-heavy and heavy-light mesons in symmetric nuclear matter and their nuclear bound states. We use a combined approach with the quark-meson coupling (QMC) model and an effective Lagrangian. As demonstrated by the cases of pionic and kaonic atoms, studies of meson-nucleus bound state can provide us with important information on chiral symmetry in dense nuclear medium. In this review, we treat the mesons, $K, K^*, D, D^*, B, B^*, \eta, \eta', \phi, \eta_c, J/\psi, \eta_b, \Upsilon$, and $B_c$, where our emphasys is on the heavy mesons. In addition, we also present some new results for the $B_c$-nucleus bound states.