Constraints on Coupling Constants through Charged $\Sigma$ Photoproduction

Abstract

The few available data for the reactions $\gamma p\to K^0{\Sigma }^{+}$ and $\gamma n\to K^{+}{\Sigma }^{-}$ are compared to models developed for the processes $\gamma p\to K^{+}{\Sigma }^0$ and $\gamma p\to K^{+}\Lambda$. It is found that some of these phenomenological models overpredict the measurements by up to a factor of 100. Fitting the data for all of these reactions leads to drastically reduced Born coupling constants.

Comments: 12 pages RevTeX-file, 2 postscript figures available upon request, to appear in Phys. Rev. C, March 1995 (Rapid Comm.).