Speaker
Description
Mapping the light meson spectrum in the strongly coupled regime of QCD requires disentangling overlapping resonant and non-resonant contributions in multi-body final states, especially in channels where exotic quantum numbers may appear. This presentation highlights the ongoing amplitude studies of the lightest spin-exotic hybrid candidate, the $\pi_1$, in photoproduced $\eta\pi$ and $\eta'\pi$ systems using high-statistics data from the GlueX experiment at Jefferson Lab. With its linearly polarized photon beam and near-complete charged and neutral final-state coverage, GlueX enables amplitude analyses that exploit polarization, including separation by exchange naturality, to provide additional constraints on the production amplitudes and improve their sensitivity to potential underlying exotic contributions.