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arXiv · 1010.0206

Baryons in and beyond the quark-diquark model

G. Eichmann·R. Alkofer·C. S. Fischer·A. Krassnigg·D. Nicmorus
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Abstract

We examine the nucleon's electromagnetic form factors in a Poincare-covariant Faddeev framework. The three-quark core contributions to the form factors are obtained by employing a quark-diquark approximation. We implement the self-consistent solution for the quark-photon vertex from its inhomogeneous Bethe-Salpeter equation. We find that the resulting transverse parts which add to the Ball-Chiu vertex have no significant impact on nucleon magnetic moments. The current-quark mass evolution of the form factors agrees with results from lattice QCD.

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G. Eichmann, R. Alkofer, C. S. Fischer, A. Krassnigg, D. Nicmorus. 2010-10-01. Baryons in and beyond the quark-diquark model. https://doi.org/10.1063/1.3647216

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