# $\Omega_c$ excited states: a molecular approach with heavy-quark spin symmetry

## TL;DR

This paper models the recently observed excited $\\Omega_c$ states using a molecular baryon-meson approach that respects chiral and heavy-quark spin symmetries, identifying potential theoretical counterparts to experimental findings.

## Contribution

It introduces a molecular baryon-meson model incorporating heavy-quark spin symmetry to explain $\\Omega_c$ excited states and compares regularization schemes for better state identification.

## Key findings

- At least three states match experimental data
- States have spin-parity $J=1/2^-$ or $J=3/2^-$
- Model predicts states below 3 GeV that relate to observed resonances

## Abstract

The LHCb Collaboration has recently discovered five excited $\Omega_c$ states with masses between 3 and 3.1 GeV, four of them corroborated by the Belle Collaboration. We analyse the dynamical generation of these states within a molecular baryon-meson model that is consistent with both chiral and heavy-quark spin symmetries. Earlier predictions within this model found five $\Omega_c$ states with masses below 3 GeV. Thus, in order to study the possible identification of any of these states with the experimental ones in the correct energy region, we explore two different regularization schemes, that is, a modified regularization subtraction method and a cutoff regularization scheme. We find that at least three of the dynamically generated states can be identified with the experimental ones and have spin-parity $J=1/2^-$ or $J=3/2^-$