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Quark-hadron duality and the nuclear EMC effect

W. Melnitchouk, K. Tsushima, A. W. Thomas

nucl-tharXiv:nucl-th/0110071

Abstract

Recent data on polarized proton knockout reactions off He-4 nuclei suggest a small but nonzero modification of proton electromagnetic form factors in medium. Using model independent relations derived on the basis of quark-hadron duality, we relate the medium modification of the form factors to the modification at large x of the deep-inelastic structure function of a bound proton. This places strong constraints on models of the nuclear EMC effect which assume a large deformation of the intrinsic structure of the nucleon in medium.

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