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Nucleon Properties in the Perturbative Chiral Quark Model | V. E. Lyubovitskij
; Th. Gutsche
; Amand Faessler
; | Date: |
4 May 2001 | Journal: | Mainz 2001, NSTAR 2001, 155-162 | Subject: | hep-ph | Affiliation: | Tuebingen and Tomsk University), Th. Gutsche (Tuebingen University), Amand Faessler (Tuebingen University | 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. | Source: | arXiv, hep-ph/0105044 | Services: | Forum | Review | PDF | Favorites |
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