The electromagnetic form factors of the $\Delta$ and $\Omega$ baryons are calculated in the framework of Poincaré-covariant bound-state equations. The quark-quark interaction is truncated to a single dressed-gluon exchange where for the dressings we use two different models and compare the results. The calculation predicts an oblate shape for the electric charge distribution and a prolate shape for the magnetic dipole distribution. We also identify the necessity of including pion-cloud corrections at low photon-momentum transfer.

• Received 26 February 2013

DOI:https://doi.org/10.1103/PhysRevD.87.096015