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arxiv: 1302.6048 · v2 · pith:WQFOUPWPnew · submitted 2013-02-25 · ✦ hep-ph

Delta and Omega electromagnetic form factors in a three-body covariant Bethe-Salpeter approach

classification ✦ hep-ph
keywords deltadistributionelectromagneticfactorsformomegashapeapproach
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The electromagnetic form factors of the Delta and Omega baryons are calculated in the framework of Poincare-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.

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