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Nucleon Properties in the Perturbative Chiral Quark Model

V. E. Lyubovitskij·Th. Gutsche·Amand Faessler
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Abstract

We apply the perturbative chiral quark model (PCQM) to analyse low-energy nucleon properties: electromagnetic form factors, meson-nucleon sigma-terms and pion-nucleon scattering. Baryons are described as bound states of valence quarks surrounded by a cloud of Goldstone bosons (pi, K, eta) as required by chiral symmetry. The model is based on the following guide lines: chiral symmetry constraints, fulfilment of low-energy theorems and proper treatment of sea-quarks, that is meson cloud contributions. Analytic expressions for nucleon observables are obtained in terms of fundamental parameters of low-energy pion-nucleon physics (weak pion decay constant, axial nucleon coupling constant, strong pion-nucleon form factor) and of only one model parameter (radius of the nucleonic three-quark core). Our results are in good agreement with experimental data and results of other theoretical approaches.

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V. E. Lyubovitskij, Th. Gutsche, Amand Faessler. 2001-05-04. Nucleon Properties in the Perturbative Chiral Quark Model. https://doi.org/10.1142/9789812810878_0019

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