2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55215A possibility is discussed that new nontrivial Chern-Simons like terms may be generated in (3+1)--dimensional QED Lagrangian, when induced by quark loops interacting with a non-abelian background field in an SU(2) model of QCD.9 pages, LATEX, added references for the Introduction and DiscussionHigh Energy Physics - Theorytext