Q^2 evolution of parton distributions at small x. A study of higher-twist effects

Abstract

We investigate the Q^2 evolution of parton distributions at small x values, obtained in the case of flat initial conditions. The contributions of twist-two and (renormalon-type) higher-twist operators of the Wilson operator product expansion are taken into account. The results are in excellent agreement with deep inelastic scattering experimental data from HERA.

Comments: 7 pages, latex. Talk presented at the XV International Seminar Relativistic Nuclear Physics and Quantum Chromodynamics, Dubna, September 2000