QUARK-CLUSTERING EFFECTS IN NEUTRINO–NUCLEON DEEP INELASTIC SCATTERING

The deep inelastic scattering of neutrinos on unpolarized nucleons is considered in a generalized parton model which takes into account quark-clustering effects, modeled by diquarks. The diquark contributions are expected to be significant at small Q2 values and to vanish asymptotically, and describe phenomenologically higher twist corrections. The most general case is studied, which includes both scalar and pseudovector diquarks inside the nucleons, as well as the contribution of scalar–vector and vector–scalar transitions. The resulting scaling violations are briefly discussed.