ANNALS OF PHYSICS: 75, 103-131 (1973) Final State Interactions in Large Momentum Transfer Inelastic Electron-Deuteron Scattering* Ross SMITH+ Cavendish Laboratory, Cambridge, England AND COLIN WILKIN University College London, London, England Received January 7, 1972 A theory for large momentum transfer quasielastic electron-deuteron scattering is developed using a diagrammatic technique, and expressions derived for those triply and doubly differentiated cross sections which are experimentally measured. The effects of spin are included in an approximate way, and the results are compared with recent experiments when this is possible. The importance of the various corrections is in- vestigated. INTRODUCTION The electric and magnetic form factors of the proton Gg)(t) and G:‘(t) can be found in a straightforward manner from electron-proton scattering experiments as a function of the momentum transfer 1. Several phenomenological parametri- zations have been found for these two quantities [l], of which the ‘dipole fit’ Gk’(t) = (1 - t/O.71)-2 (1) G’“‘(t) = 2.79Gg’(r) 7n is possibly the most widely used. Due to the lack of free neutron targets, however, the measurement of the analogous quantities for the neutron, G($) and Gc), involves perforce scattering experiments * Based in Part on a Ph.D. thesis submitted by one of the Authors (R.S.) to the University of Cambridge. *Present address: Department of Physics, University of Canterbury, Christchurch, New Zealand. 103 Copyright 0 1973 by Academic Press, Inc. All rights of reproduction in any form reserved.