Photo-production of $\omega $ Meson Using CLAS at Jefferson Laboratory

Photo-production of $\omega $ meson was studied using CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Laboratory. We have obtained preliminary results on two observables that have been measured from the reaction $\gamma $p $\to $ p$\omega $ : the differential cross section and the double polarization observable \textbf{E}. The differential cross section measurement was performed using tagged photon beam with energy range up to 5.4 GeV, incident on unpolarized liquid hydrogen target. While the double polarization observable \textbf{E} was measured using circularly-polarized tagged photon beam with energy range up to 2.4 GeV and longitudinally-polarized butanol target. The differential cross section as well as the polarization observable allow us to find the N$^{\mathrm{\ast }}$ resonances that decay to p$\omega $ through multi-channel Partial Wave Analysis (PWA) method. They also provide a probe to test theoretical models about the production mechanism of $\omega $ meson and also the scaling behavior of the cross section.