Eur. Phys. J. A (2003) 17: 297-301
https://doi.org/10.1140/epja/i2002-10170-1

Original Paper

Nucleon structure vs. theoretical models

Helsinki Institute of Physics and Department of Physics, University of Helsinki, PL 64, 00014, Finland

^* e-mail: riska@science.helsinki.fi

Abstract

An overview of nucleon structure as revealed by low-energy and intermediate-energy observables is presented. The role of seaquarks is identified as the complicating feature, which has prevented capture of the overall phenomenological features by quark models with simple interactions as well as by lattice calculations in the quenched approximation, however sophisticated. The large-N_C limit of QCD provides a simple and qualitatively satisfactory framework for the description the observables of the baryons and their lowest excitations.