Delta properties in the rainbow-ladder truncation of Dyson-Schwinger equations

Abstract

We present a calculation of the three-quark core contribution to nucleon and Delta-baryon masses and Delta electromagnetic form factors in a Poincare-covariant Faddeev approach. A consistent setup for the dressed-quark propagator, the quark-quark, quark-'diquark' and quark-photon interactions is employed, where all ingredients are solutions of their respective Dyson-Schwinger or Bethe-Salpeter equations in a rainbow-ladder truncation. The resulting Delta electromagnetic form factors concur with present experimental and lattice data.

Comments: 6 pages, 3 figures. Contributed to the International Workshop on Relativistic Description of Two- and Three-body Systems in Nuclear Physics, ECT* Trento, 19 - 23 October 2009