2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164279This is a comment on Chen et al Letter PRL,100, 232002 (2008).Submitted to Physical Review LettersGeneral PhysicsHigh Energy Physics - PhenomenologyComment on "Spin and Orbital Angular Momentum in Gauge Theories: Nucleon Spin Structure and Multipole Radiation Revisited"text