Higher-Twist Mechanism and Inclusive Gluon Production in Pion-Proton Collisions

Abstract

We calculate the contribution of the higher-twist Feynman diagrams to the largepT inclusive gluon production cross section in πp collisions incase of the running coupling and frozen coupling approaches within perturbative and holographic QCD. The structure of infrared renormalon singularities of the higher-twist subprocess cross section are obtained and the resummed higher-twist cross sections (Borel sum) with the ones obtained in the framework of the frozen coupling approach and leading-twist cross section are compared and analyzed.