Return of the EMC effect: Finite nuclei

A light front formalism for deep inelastic lepton scattering from finite nuclei is developed. In particular, the nucleon plus momentum distribution and a finite system analog of the Hugenholtz--van Hove theorem are presented. Using a relativistic mean field model, numerical results for the plus momentum distribution and ratio of bound to free nucleon structure functions for oxygen, calcium, and lead are given. We show that we can incorporate light front physics with excellent accuracy while using easily computed equal time wave functions. Assuming nucleon structure is not modified in-medium we find that the calculations are not consistent with the binding effect apparent in the data not only in the magnitude of the effect, but also in the dependence on the number of nucleons.

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