Relativistic Quark-Model Results for Baryon Ground and Resonant States

TL;DR

This paper presents relativistic quark model calculations for baryon ground and resonant states, including spectral properties, electromagnetic structures, and decay widths, leading to a new classification scheme based on detailed wave function analysis.

Contribution

It introduces covariant predictions for decay widths and a novel classification scheme for baryons based on relativistic models and wave function structures.

Findings

Distinct decay width patterns from previous models

Supports extended SU(3) classification of baryons

Provides detailed wave function analyses

Abstract

Latest results from a study of baryon ground and resonant states within relativistic constituent quark models are reported. After recalling some typical spectral properties, the description of ground states, especially with regard to the nucleon and hyperon electromagnetic structures, is addressed. In the following, recent covariant predictions for pion, eta, and kaon partial decay widths of light and strange baryon resonances below 2 GeV are summarized. These results exhibit a characteristic pattern that is distinct from nonrelativistic or relativized decay studies performed so far. Together with a detailed analysis of the spin, flavor, and spatial structures of the wave functions, it supports a new and extended classification scheme of baryon ground and resonant states into SU(3) flavor multiplets.