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Physics Letters B
We calculate the cross section for the Callan-Rubakov effect using a classical approach. The equations of motion of a charged particle with spin in the field of a Dirac monopole are solved and a cross section for the capture process is calculated. A similar calculation is performed for superconducting cosmic strings. In this case the cross section is seen to have a leading order dependence on the string width and a long-range energy harrier is found.doi:10.1016/0370-2693(89)90521-2 fatcat:7xp5dalygzez5pui5dq57du3cm