Higher-twist mechanism and inclusive gluon production in pion-proton collisions

TL;DR

This paper investigates the impact of higher-twist mechanisms on inclusive gluon production in pion-proton collisions, comparing different QCD approaches and analyzing infrared renormalon effects.

Contribution

It provides a detailed calculation of higher-twist contributions using both perturbative and holographic QCD, including resummation techniques and infrared singularity analysis.

Findings

Higher-twist effects significantly influence gluon production cross-sections.

Resummed higher-twist cross-sections differ from leading-twist results.

Infrared renormalon singularities are characterized and analyzed.

Abstract

We calculate the contribution of the higher-twist Feynman diagrams to the large-$p_T$ inclusive gluon production cross-section in $\pi p$ collisions in case 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 is 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.