νW2 at small ω′ and resonance form factors in a quark model with broken SU(6)

Abstract

The small ω′ behaviour of F 2 en/ F 2 ep and the apparent difference in the q 2 dependences of the magnetic form factor of the proton and of the transition to Δ +(1236) are quantitatively correlated in a model where nucleon consistes of a quarks and a scalar or vector core. The proton and Δ transition form factors suggest that only the scalar core contributes at large q 2 and small ω′. As a result the ω′ dependence of F 2 en F 2 ep is obtained for ω′ < 3 and predictions for the weak structure functions and polarisation asymmetries at small ω′ are presented. We predict F ν p F ν n ω′→10 asymmetries ω′→11 and also expect that G m n G m p → −1 2 as q 2→∞.