The Kaon-Photoproduction Of Nucleons In The Quark Model

Abstract

In this paper, we develop a general framework to study the meson-photoproductions of nucleons in the chiral quark model. The S and U channel resonance contributions are expressed in terms of the Chew-Goldberger-Low-Nambu (CGLN) amplitudes. The kaon-photoproduction processes, $\gamma p\to K^{+}\Lambda$, $\gamma p\to K^{+}{\Sigma }^0$, and $\gamma p\to K^0{\Sigma }^{+}$, are calculated. The initial results show that the quark model provides a much improved description of the reaction mechanism for the kaon-photoproductions of the nucleon with less parameters than the traditional phenomenological approaches.

Comments: 25 pages, 9 postscript figures can be obtained from the author.