QCD dipole predictions for quark singlet, gluon and Fₗ/Fₜ distributions at HERA

الأصل · EN

In this contribution we apply the QCD dipole picture combined with kₜ-factorization to get predictions for deep-inelastic scattering on an onium. Assuming renormalization-group factorization, we get predictions for the F₂, FG and R= Fₗ/Fₜ proton structure functions. We obtain a three-parameter fit of the 1994 H1 data in the low-xbj, moderate-Q² range. FG/F₂ and R are then predicted without any additionnal parameter. The BFKL dynamics contained in the dipole model is shown to provide a relevant model in describing the HERA data. The prediction for F₂ and FG are compatible with next-to-leading order DGLAP analysis. By contrast, R is expected to be much lower at small xbj.