Effects of a spin-flavour dependent interaction on the baryon mass spectrum

TL;DR

This paper introduces a flavor-dependent interaction in a relativistic quark model to better match the baryon mass spectrum and electromagnetic properties, especially for negative parity Delta resonances.

Contribution

It adds a phenomenological flavor-dependent force to the Salpeter-based quark model, improving the description of baryon spectra and form factors.

Findings

Enhanced agreement with experimental baryon masses

Improved modeling of negative parity Delta resonances

Better fit to electromagnetic form factors

Abstract

The effective quark interaction in a relativistically covariant constituent quark model based on the Salpeter equation is supplemented by an extra phenomenological flavour dependent force in order to account for some discrepancies mainly in the description of excited negative parity Delta resonances. Simultaneously an improved description of some other features of the light-flavoured baryon mass spectrum and of some electromagnetic form factors is obtained.