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Coulomb sum rule for 4HeWe determine the Coulomb sum for 4He using world data on 4He)e, e') and compare the results to calculations based on realistic interactions and including two-body components in the nuclear charge operator. We find good agreement between theory and experiment using free-nucleon form factors. The apparent reduction of the in-medium Gep implied by IA-interpretation of the L/T-ratios measured in 4He(e,e'p) and 4He([vec]e, e'p) is not confirmed. Authors: J. Carlson, J. Jourdan, R. Schiavilla, I. Sick
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