Scaling approach to higher-twist corrections

Bjorken scaling is violated. At large x-values (0.7 ≲ x ≤ 1) the violation is mainly attributed to ∝1Q2 (higher-twist) corrections. We discuss how to incorporate such corrections by using a new scaling variable x(x, Q2) which accounts for the non-perturbative effects due to the confining parton interaction in the final state. The approach can accommodate also the remaining QCD logarithmic corrections and the behaviour of the F2(x, Q2) structure functions is reproduced, in a quite natural way, within a wide kinematical range.