Long-range electroweak amplitudes of single hadrons from Euclidean finite-volume correlation functions

Abstract

The authors relate an amplitude in infinite volume Minkowski spacetime to a matrix element with two currents in finite volume Euclidean spacetime. This relation opens a wide class of new observables to numerical lattice QCD computations, such as Compton scattering of mesons and nucleons, double beta decays, and radiative corrections to single beta decays of hadrons stable under the strong interactions.