2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49811The massive SU(2) gauge field theory coupled with fermions is considered in 2+1 dimensions. Quark energy spectrum and radiative shift in constant external nonabelian field, being exact solution of the gauge field equations with the Chern-Simons term, are calculated. Under the condition $m = θ/4$ the quark state is shown to be supersymmetric.5 pages, LATEX Submitted for publication to Vest. Mosk. Univ., Fiz. AstronHigh Energy Physics - Theorytext