Speaker
Description
The mission of the Charged Pion Polarizability (CPP) experiment at Jefferson Lab is probing the $\gamma \gamma \to \pi \pi$ channel to extract the value of the pion polarizability from the Primakoff cross section. CPP was performed in experimental Hall D starting in the spring of 2022 and finishing in late summer, totaling 129,152,986,149 production events recorded. Hall D is home to the GlueX target and detector array, which was retrofitted with a $^{208}$Pb target and new muon detector for the CPP run. The additional detector's main role is identifying muon tracks which is crucial for removing background to isolate the Primakoff channel. Post experiment efforts have been focused on calibration, constructing a pure muon sample from the data, constructing a pure pion sample from the data, and preparing a neural net to separate muon background from pion signal.
