2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/154219We analyze the electromagnetic scattering of massive particles with and without spin and, using the techniques of effective field theory, we isolate the leading long distance effects beyond one photon exchange, both classical and quantum mechanical. Spin-independent and spin-dependent effects are isolated and shown to have a universal structure.58 pages, 3 figuresHigh Energy Physics - PhenomenologyHigh Energy Physics - TheoryNuclear Theorytext