Can the Moller scattering cross section be calculated with a two-particle potential?
The Feynman prescription for scattering two electrons, using perturbation theory (Weinberg QTF Vol1) involves squaring the J*A interaction Hamiltonian of particle "a" and ascribing the second factor to a different particle in a different field. Then tries to connect 2 independent interactions with Time-ordered propagators.. The dimensions are fudged so that JA has dimension sqrt(alpha). Lotta armwaving going on... All other physics uses two-particle potentials ... ??? My Question is Can the Moller scattering amplitude and differential cross-section be calculated using a two-particle potential?