Abstract
${\mathrm{SU}(6)}_{W}$ is used to make quantitative predictions for forward photoproduction cross sections at high energies. The predicted ratios for $\frac{\ensuremath{\sigma}(\ensuremath{\gamma}p|{K}^{+}{\ensuremath{\Sigma}}^{0})}{\ensuremath{\sigma}(\ensuremath{\gamma}p|{K}^{+}\ensuremath{\Lambda})}$, which vary from 0.5 to 1.0 for incident photons of energy 5-16 GeV, are in good agreement with the SLAC experiments. This is in contrast to the quarkmodel prediction of 1/27. The forward ${\ensuremath{\rho}}^{0}p$ and $\ensuremath{\omega}p$ photoproduction cross sections also agree very well with experiment, but the $\ensuremath{\phi}p$ cross section is too large by a factor of 2.
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