1996/11/22 by K. Geiger, Klaus Geiger · 25 citations
Physics and Astronomy · #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Equations of motion #Gluon #High-Energy Particle Collisions Research #Kinetic energy #Momentum (technical analysis) #Non-equilibrium thermodynamics #Physics #Quantum #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #hep-ph #hep-th #nucl-th
paper · pdf · doi:10.1103/physrevd.56.2665
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 56(5), 2665-2701 (American Physical Society) · 52 pages including 7 postscript figures
arxiv created 1996/11/22 · openalex publication_date 1997/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A quantum-kinetic formulation of the dynamical evolution of a high-energy nonequilibrium gluon system at finite density is developed to study the interplay between quantum fluctuations of high-momentum (hard) gluons and the low-momentum (soft) mean color field that is induced by the collective motion of the hard particles. From the exact field equations of motion of QCD, a self-consistent set of approximate quantum-kinetic equations are derived by separating hard and soft dynamics and choosing a convenient axial-type gauge. This set of master equations describes the momentum space evolution of the individual hard quanta, the space-time development of the ensemble of hard gluons, and the generation of the soft mean field by the current of the hard particles. The quantum-kinetic equations are approximately solved to order g2(1+g\ifmmode A\else \=A\fi) for a specific example, namely, the scenario of a high-energy gluon beam along the light cone, demonstrating the practical applicability of the approach.