LOW-ENERGY SKYRMION SKYRMION SCATTERING

We study the scattering of two Skyrmions at low energy and large separ ation. We use the method proposed by Manton for truncating the degrees of freedom of the system from infinite to a manageable finite number. This corresponds to identifying the manifold consisting of the union of the low energy critical points of the potential along with the grad ient flow curves joining these together and by positing that the dynam ics is restricted here. The kinetic energy provides an induced metric on this manifold while restricting the full potential energy to the ma nifold defines a potential. The low energy dynamics is now constrained to these finite number of degrees of freedom. For a large separation of the two Skyrmions the manifold is parametrized by the variables of the product ansatz. We find the interaction between two Skyrmions comi ng from the induced metric, which was independently found by Schroers. We find that the static potential is actually negligible in compariso n to this interaction. Thus to lowest order, at large separation, the dynamics reduces to geodesic motion on the manifold. We consider the s cattering to first order in the interaction using the perturbative met hod of Lagrange and find that the dynamics in the no spin or charge ex change sector reduces to the Kepler problem.