Contradiction between deep-inelastic data and the neutron charge radius in naive three-point-quarks models

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Abstract
Generalizing a previous result, we derive a theorem proving a contradiction between deep-inelastic data and the neutron charge radius for a large class of three-point-quarks nulceon wave functions (including mixing with an arbitrary 70). We briefly discuss the possible ways out. In particular we point out that a nonisoscalar component of the sea, including a pion cloud, might solve the problem.