2005/10/03 by Reinhard Alkofer, R. Alkofer, Markus Klöker +3 · 2 citations
Physics and Astronomy · #Color confinement #Diquark #Gauge boson #Gauge fixing #Gauge theory #Gluon #Gluon field #High-Energy Particle Collisions Research #Mathematical physics #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Propagator #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quark #Scalar (mathematics) #hep-ph #hep-th #nucl-th
paper · pdf · doi:10.1103/physrevlett.96.022001
published as Phys.Rev.Lett96:022001,2006 · 4 pages, 6 figures
arxiv created 2005/10/03 · openalex publication_date 2006/01/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Phenomenological consequences of the infrared singular, instantaneous part of the gluon propagator in the Coulomb gauge are investigated. The corresponding quark Dyson-Schwinger equation is solved, neglecting retardation and transverse gluons and regulating the resulting infrared singularities. While the quark propagator vanishes as the infrared regulator goes to zero, the frequency integral over the quark propagator stays finite and well defined. Solutions of the homogeneous Bethe-Salpeter equation for the pseudoscalar and vector mesons as well as for scalar and axial-vector diquarks are obtained. In the limit of a vanishing infrared regulator the diquark masses diverge, while meson properties and diquark radii remain finite and well defined. These features are interpreted with respect to the resulting aspects of confinement for colored quark-quark correlations.