Holstein, BR2024-04-262024-04-262008-01-01https://hdl.handle.net/20.500.14394/41048This is the pre-published version received from arXiv. The published version is located at http://prd.aps.org/abstract/PRD/v78/i1/e013001We analyze the electromagnetic scattering of massive particles with and without spin wherein one particle (or both) is electrically neutral. Using the techniques of effective field theory, we isolate the leading long distance effects, both classical and quantum mechanical. For spinless systems results are identical to those obtained earlier via more elaborate dispersive methods. However, we also find new results if either or both particles carry spin.Physical Sciences and Mathematicsarticle