Speaker
Description
The GlueX experiment at Jefferson Lab uses linearly polarized photoproduction to study the light quark meson spectrum and search for spin-exotic mesons. The linear polarization of the beam allows separation of the natural and unnatural production mechanisms in $t$-channel production. The production mechanisms of the axial vector $b_1(1235)$ meson can be measured via amplitude analysis of the $\omega\pi$ channel. This amplitude analysis procedure will be described for the charge exchange reaction $\gamma p\to\omega\pi^-\Delta^{++}$, and the production mechanisms of the charged $b_1^-$ at low momentum transfer will be presented and compared with those of the neutral $b_1^0$.