2008/03/31 by A. I. Ahmadov, Azar I. Ahmadov, Coskun Aydin +5 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.80.016003
published as Phys.Rev.D80:016003,2009 · 28 pages, 13 figures
openalex publication_date 2009/07/07 · arxiv created 2009/07/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
In this article, we investigate the contribution of the higher-twist Feynman diagrams to the large-pT inclusive pion production cross section in proton-proton collisions and present the general formulas for the higher-twist differential cross sections in the case of the running coupling and frozen coupling approaches. The structure of infrared renormalon singularities of the higher-twist subprocess cross section and the resummed expression (the Borel sum) for it are found. We compared the resummed higher-twist cross sections with the ones obtained in the framework of the frozen coupling approach and leading-twist cross section. We obtain, that ratio R=(\ensuremathΣ_\ensuremathπ+HT)res/(\ensuremathΣ_\ensuremathπ+HT)0, for all values of the transverse momentum pT of the pion identically equivalent to ratio r=(\ensuremathΔ_\ensuremathπHT)res/(\ensuremathΔ_\ensuremathπHT)0. It is shown that the resummed result depends on the choice of the meson wave functions used in calculation. Phenomenological effects of the obtained results are discussed.