Quark Structure of the Nucleon and Nucleon Resonances

Abstract

Strong interaction physics deals with the structure and dynamics of hadrons, which can suitably be classified according to the baryon number B. The simplest hadronic systems accordingly are the mesons (B = 0) and the baryons (B = 1). The internal structure of these objects is reflected by their excitation spectra and their decay properties. Ultimately it is expected, that these can be calculated from the fundamental theory of strong interactions: QuantumChromoDynamics. So far, however, it has not been possible to rigorously apply this theory even to the simplest hadrons and to achieve a realistic description of their excitation patterns. Accordingly, the explanation of the hadronic spectra is the realm of a wide variety of QCD-inspired, but nevertheless phenomenological models, among which the most prominent are: constituent quark models: non-relativistic potential models; bag-models. topological models based on non-linear meson dynamics, like e.g. the Skyrme-model. KeywordsDecay WidthMass SplittingConstituent QuarkPseudoscalar MesonHeavy QuarkoniaThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.