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

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.

arXiv comment16 pages, 7 figures, 1 table, added references

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• Extracting the Omega- electric quadrupole moment from lattice QCD data
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