Relativistic study of nucleon electroweak properties in a constituent-quark model
Institut für Theoretische Physik, Universität Graz, Universitätsplatz 5, A-8010, Graz, Austria
2 Dipartimento di Fisica Nucleare e Teorica, Universitá di Pavia, and Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, Via Bassi 6, I-27100, Pavia, Italy
3 Department of Physics and Astronomy, University of Iowa, IA 52242, Iowa City, USA
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We discuss the predictions of the Goldstone-boson-exchange constituent-quark model for the proton and neutron electric and magnetic form factors as well as the nucleon axial and induced pseudoscalar form factors. The results are calculated in a covariant framework using the point-form approach to relativistic quantum mechanics. The only input into the calculations is the nucleon wave function from the constituent-quark model. A remarkably consistent picture, with all aspects of the electroweak nucleon structure close to existing experimental data, is obtained.
© Società Italiana di Fisica and Springer-Verlag, 2003