2009/11/30 by A. I. Ahmadov, C. Aydın, Coskun Aydin +2
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Coupling (piping) #Cross section (physics) #Feynman diagram #Gravitational singularity #High-Energy Particle Collisions Research #Meson #Momentum (technical analysis) #Nuclear physics #Particle physics #Photon #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Renormalon #Sigma #Twist #hep-ph
paper · pdf · doi:10.1103/physrevd.81.054016
published as Phys.Rev.D81:054016,2010 · 45 pages, 33 figures, 4 tables
openalex publication_date 2010/03/17 · arxiv created 2010/03/29 · arxiv updated 2010/04/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this article, we investigate the contribution of the higher-twist Feynman diagrams to the large-pT inclusive single meson production cross section in photon-photon collisions and present the general formulas for the higher-twist differential cross sections in 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_M+HT)res/(\ensuremathΣ_M+HT)0, for all values of the transverse momentum pT of the meson identically equivalent to ratio r=(\ensuremathΔMHT)res/(\ensuremathΔMHT)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.