Quark models for baryon static properties and the excitation of low-lying baryonic states

SU-6 symmetry in dynamic quark models is used to discuss the structure of low-lying hadronic states. A detailed classification of low-lying meson and baryon states is given in the L-excited quark model, in which it is assumed that the quark interaction is through a potential well with orbital energies increasing with orbital angular momentum. Next the wave functions for these states are constructed and color is introduced. Excited state (L not = 0) baryon wave functions are discussed utilizing the theory of mixed symmetry states. The explicit structure of the spacial wave functions are given in both the nonrelativistic harmonic oscillator model and the quark bag model. Finally, a brief discussion is given of weak excitation of baryon resonances and calculation of renormalization properties of vector, axial, scalar, pseudoscalar, and tensor currents