2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/109922Dynamical and non-dynamical components of the 20-component wave function are separated in the generalized Dirac equation of the first order, describing fermions with spin 1/2 and two mass states. After the exclusion of the non-dynamical components, we obtain the Hamiltonian Form of equations. Minimal and non-minimal electromagnetic interactions of particles are considered here.7 pages, invited paper for the Special Issue of Electr. Jour. Theor. Phys. dedicated to Ettore MajoranaHigh Energy Physics - PhenomenologyAstrophysicsHigh Energy Physics - TheoryQuantum Physicstext