Charged pion electric polarizability in lattice QCD*

We explore a four-point-function-based method in lattice QCD that mimics low-energy Compton scattering and offers a transparent picture on how polarizabilities arise from quark and gluon interactions. We carry out a proof-of-concept simulation on the electric polarizability of a charged pion, using quenched Wilson action on a $24^3 imes 48$ lattice at beta=6.0 with pion mass from 1100 to 370 MeV. We report results on pion mass, rho mass, form factor and charge radius, and electric polarizability.