Towards charged hadron polarizabilities from four-point functions in lattice QCD
Walter Wilcox,
Frank X. Lee
Abstract:We show how to compute electromagnetic polarizabilities of charged hadrons using four-point functions in lattice QCD. The low-energy behavior of Compton scattering amplitude is matched to matrix elements of current-current correlation functions on the lattice. Working in momentum space, formulas for electric polarizability (αE) and magnetic polarizability (βM ) are derived for both charged pion and proton. Lattice four-point correlation functions are constructed from quark and gluon fields to be used in Monte-… Show more
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