1998/02/28 by Philipp Hägler, P. Haegler, Andreas Schäfer +1 · 56 citations
Physics and Astronomy · #Angular momentum #Angular momentum coupling #Angular momentum of light #Angular momentum operator #Classical mechanics #DGLAP #Gluon #High-Energy Particle Collisions Research #Matrix (chemical analysis) #Moment (physics) #Orbital angular momentum of light #Orbital motion #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quark #Spin (aerodynamics) #Total angular momentum quantum number #hep-ph
paper · pdf · doi:10.1016/s0370-2693(98)00414-6
published in Physics Letters B 430(1-2), 179-185 (Elsevier BV) · 10 pages in LaTeX with 1 eps-figure; missing Ψin eq.(10) added; p.7/8: short paragraph dropped, one definition added
openalex publication_date 1998/06/01 · arxiv created 1998/10/07 · arxiv updated 2014/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Based on a sumrule for the nucleon spin we expand quark and gluon orbital angular momentum operators and derive an evolution matrix for higher moments of the corresponding distributions. In combination with the spin-dependent DGLAP-matrix we find a complete set of spin and orbital angular momentum evolution equations.