A relationship is obtained between the $S$ matrix for the charge-exchange scattering of a fermion by a Julia-Zee dyon and the flux of fermions emitted by the dyon when the mass of the fermions is sufficiently small. In the limit of a pointlike dyon, the required $S$-matrix elements are obtained in closed form and the corresponding fermion flux is computed explicitly.

• Received 17 September 1981

DOI:https://doi.org/10.1103/PhysRevD.25.2128