2008/01/31 by S. S. Agaev, M. A. Gomshi Nobary
Mathematics · Physics and Astronomy · #Combinatorics #Gluon #Graph #High-Energy Particle Collisions Research #Mathematics #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Prime (order theory) #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Renormalon #Vector meson dominance #Vertex (graph theory) #Vertex function #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-008-0524-7
published as Eur.Phys.J.C54:219-229,2008
openalex publication_date 2008/01/31 · arxiv created 2008/05/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Power-suppressed corrections arising from end-point integration regions to the space-like vertex function of the massive eta'-meson virtual gluon transition eta' - g*g* are computed. Calculations are performed within the standard hard-scattering approach (HSA) and the running coupling method supplemented by the infrared renormalon calculus. Contributions to the vertex function from the quark and gluon contents of the eta' -meson are taken into account and the Borel resummed expressions for Feta' g*g*(Q2,ω,η), as well as for Feta' g g*(Q2,ω=± 1,η) and Feta' g*g*(Q2,ω=0,η) are obtained. It is demonstrated that the power-suppressed corrections ∼ (Λ2/Q2)n, in the explored range of the total gluon virtuality 1 <Q2 < 25 GeV2, considerably enhance the vertex function relative to the results found in the framework of the standard HSA with a fixed coupling. Modifications generated by the eta ' -meson mass effects are discussed.