Abstract
The and reactions are studied using a dynamical coupled-channel model of meson-baryon interactions at energies where the baryon resonances are strongly excited. The channels included are: , , and . The resonances considered are: ; ; ; and . The basic nonresonant and transition potentials are derived from effective Lagrangians using a unitary transformation method. The dynamical coupled-channel equations are simplified by parametrizing the amplitudes in terms of empirical partial-wave amplitudes and a phenomenological off-shell function. Two models have been constructed. Model is built by fixing all coupling constants and resonance parameters using symmetry, the Particle Data Group values, and results from a constituent quark model. Model is obtained by allowing most of the parameters to vary around the values of model in fitting the data. Good fits to the available data for have been achieved. The investigated kinematics region in the center-of-mass frame goes from threshold to . The constructed models can be imbedded into associated dynamical coupled-channel studies of kaon photo- and electroproduction reactions.
4 More- Received 22 April 2004
DOI:https://doi.org/10.1103/PhysRevC.69.065208
©2004 American Physical Society