INVESTIGATION OF $WW\gamma$ COUPLINGS

We investigated how measurements of weak boson production at high energy $ep$ and $e\gamma$ collisions can provide important information on anomalous $WW\gamma$ couplings. We also considerd the sinlge muon production through the virtual $W$-decay at the Pohang Light Source (PLS) facility, and found this process is not adequate to be detected at the PLS until a large luminosity ($\sim 10^{33}$/sec/cm$^2$) Free Electron Laser is installed.