Delta and Omega electromagnetic form factors in a Dyson-Schwinger/Bethe-Salpeter approach

TL;DR

This paper calculates the electromagnetic form factors of Delta and Omega baryons using a Poincare-covariant Dyson-Schwinger/Bethe-Salpeter framework, aligning well with experimental and lattice data.

Contribution

It introduces a consistent Dyson-Schwinger/Bethe-Salpeter approach with a quark-diquark approximation for baryon form factors, matching experimental and lattice results.

Findings

Predictions agree with experimental data.

Results are compatible with quark-model estimates.

Static properties match lattice calculations.

Abstract

We investigate the electromagnetic form factors of the Delta and the Omega baryons within the Poincare-covariant framework of Dyson-Schwinger and Bethe-Salpeter equations. The three-quark core contributions of the form factors are evaluated by employing a quark-diquark approximation. We use a consistent setup for the quark-gluon dressing, the quark-quark bound-state kernel and the quark-photon interaction. Our predictions for the multipole form factors are compatible with available experimental data and quark-model estimates. The current-quark mass evolution of the static electromagnetic properties agrees with results provided by lattice calculations.