Beam Asymmetry for Photoproduced ω Mesons Off Bound Protons in Deuterons

We extracted quasi-free γ d→ω p(n) photon beam asymmetry polarization observable from the photoproduction of ω mesons off the bound proton inside deuterium using a linearly polarized photon beam. The ω meson was identified through its charged decay ω→π⁺ π^- π⁰ where the π⁰ subsequently decays in two photons. The data were taken during the E06-103 (g13) experiment with the CLAS detector in Hall B at the Thomas Jefferson National Accelerator Laboratory (JLab). This decay of N* resonances to ω from photoproduction off a proton is of great interest as ω is an isospin filter. The ωN states can only be produced from N* states with isospin I = 1/2 and not by Δ* states with isospin I = 3/2. Furthermore, since its threshold is above the π and η photoproduction thresholds, the ω meson channel can give information on higher mass resonances (i.e., the region where the proton spectrum is less understood).