Investigating π₁ (1600) hybrid meson decay with GlueX data

Our research investigates the decay channel π₁⁺ → η′ π⁺, with η′ → π⁺ π⁻ γ γ, as a promising probe for identifying the exotic π₁(1600) hybrid meson. Using final-state kinematics, event selection, and invariant mass analysis, we aim to isolate potential hybrid signals in photoproduction events. This early-stage study focuses on reconstructing the η′ peak and applying optimized selection cuts guided by simulations. We use a combination of generated and accepted Monte Carlo data to refine cuts on variables like χ²/ndf, missing mass², neutron β, and the Van Hove plane, improving signal sensitivity and reducing background. Our results show a clear η′ signal post-selection, demonstrating that this channel is viable for further analysis. However, no distinct π₁(1600) signal is yet observed, suggesting that additional decay channels or refined reconstruction strategies may be needed. Neutron kinematics comparisons reveal mismatches between real and simulated data due to missing-mass-based reconstruction, emphasizing the importance of accurate modeling. These findings lay the groundwork for future partial wave analyses to uncover exotic meson candidates.