1999/05/10 by L. Mankiewicz, G. Piller · 3 citations
Physics and Astronomy · #Factorization #Feynman diagram #Gluon #High-Energy Particle Collisions Research #Mathematical physics #Meson #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Parton #Photon #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Vector meson #hep-ph
paper · pdf · doi:10.1103/physrevd.61.074013
published as Phys.Rev. D61 (2000) 074013
arxiv created 1999/05/10 · openalex publication_date 2000/02/23 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We discuss the electroproduction of light vector mesons from transversely polarized photons. Here QCD factorization cannot be applied as shown explicitly in a leading-order calculation. It is emphasized that present infrared singular contributions cannot be regularized through phenomenological meson distribution amplitudes with suppressed end-point configurations. We point out that infrared divergences arise also from integrals over skewed nucleon parton distributions. In a phenomenological analysis of transverse vector meson production model-dependent regularizations have to be applied. If this procedure preserves the structure suggested by a leading-order calculation of Feynman diagrams, one obtains contributions from nucleon parton distributions and their derivatives. In particular, polarized gluons enter only through their derivative.