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A covariant diquark-quark model of the nucleon in the Salpeter approach

Volker Keiner
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Abstract

We develop a rather simple, formally covariant quark-diquark model of the nucleon. The nucleon is treated as a bound state of a constituent quark and a diquark interacting via a quark exchange. We include both scalar and axial-vector diquarks. The underlying Bethe-Salpeter equation is transformed into a pair of coupled Salpeter equations. The electromagnetic form factors of the nucleon are calculated in the Mandelstam formalism. We obtain a very good description of all electromagnetic form factors for momentum transfers up to -3 (GeV/c)^2.

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Volker Keiner. 1996-03-05. A covariant diquark-quark model of the nucleon in the Salpeter approach. https://doi.org/10.1103/physrevc.54.3232

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