Quark-Model Identification of Baryon Ground and Resonant States

TL;DR

This paper introduces a covariant classification scheme for baryon states using relativistic quark models, analyzing spectra, structures, and decay widths to improve understanding of baryon resonances.

Contribution

It develops a new SU(3) flavor multiplet classification scheme for baryons based on a covariant formalism and relativistic quark models, including less-established resonances.

Findings

Classification scheme is largely model-independent.

Resonances with two-star status are essential for consistent classification.

The approach aligns well with experimental baryon spectra.

Abstract

We present a new classification scheme of baryon ground states and resonances into SU(3) flavor multiplets. The scheme is worked out along a covariant formalism with relativistic constituent quark models and it relies on detailed investigations of the baryon spectra, the spin-flavor structure of the baryon eigenstates, the behaviour of their probability density distributions as well as covariant predictions for mesonic decay widths. The results are found to be quite independent of the specific types of relativistic constituent quark models employed. It turns out that a consistent classification requires to include also resonances that are presently reported from experiment with only two-star status.