Hidden supersymmetries of particle motion in a Wu-Yang monopole field

A theory is studied of the supersymmetric motion of a spin-12 particle with SU(2) colour in a Wu-Yang monopole background, in which H = Q02 relates Hamiltonian and supercharge. Two additional supercharges which anticommute with Q0 are found so that the theory possesses a hidden N = 2 supersymmetry algebra {Qi, Qj} = δij12(J2+constant), i, j = 1, 2, where J is the conserved total angular momentum.