Heavy baryons in a pion mean-field approach: A brief review

TL;DR

This paper reviews a pion mean-field approach to understanding properties of singly heavy baryons, successfully describing their masses and magnetic moments, and discusses recent experimental findings and future directions.

Contribution

It demonstrates that a pion mean-field model can accurately predict heavy baryon properties using parameters fixed from light baryons, with new insights into excited states.

Findings

Successfully described masses and magnetic moments of heavy baryons.

Provided scenarios for identifying newly observed excited $\\Omega_c$ baryons.

Outlined future prospects for the pion mean-field approach.

Abstract

We review in this paper a series of recent works on properties of singly heavy baryons, based on a pion mean-field approach. In the limit of an infinitely heavy-quark mass, the heavy quark inside a heavy baryon can be regarded as a static color source. In this limit, a heavy baryon can be viewed as $N_c-1$ valence quarks bound by the pion mean fields which are created self-consistently by the presence of the $N_c$ valence quarks. We show that this mean-field approach can successfully describe the masses and the magnetic moments of the lowest-lying singly heavy baryons, using all the parameters fixed in the light-baryon sector except for the hyperfine spin-spin interactions. We also review a recent work on identifying the newly found excited $\Omega_c$ baryons reported by the LHCb Collaboration. We discuss possible scenarios to identify them. Finally, we give a future perspective on this pion mean-field approach.