Measurement of the Charged- and Neutral-Pion Polarizabilities using the GlueX Detector in Hall-D at JLab

A central problem of modern physics research is the solution to QCD in the non-perturbative regime.  One method of testing QCD in this low-energy region is by measuring certain structure constants of hadrons — called polarizabilities — that show particular promise of allowing a direct connection to the underlying quark/gluon dynamics through comparison to modern QCD-inspired model calculations, and to solutions of QCD done computationally on the lattice.  This talk will give a status report on our measurement of cross sections for γγ→π⁺π^- and γγ→π⁰π⁰ via the Primakoff effect using the GlueX detector in Hall D at Jefferson Lab, with the end goal of precise measurements of the pion polarizability α_π - β_π for both charged and neutral pions.