Isoscalar NN spin-orbit potential from a Skyrme model with scalar mesons |
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Authors: | Abdellatif Abada |
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Affiliation: | 1. Theoretical Physics Group, Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK
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Abstract: | As a first step toward circumventing the difficulty to obtain an attractive isospin-independent NN spin-orbit force from Skyrme-type models involving only pions, we investigate an improved Skyrme Lagrangian that incorporates the scalar-isoscalar meson ε which can be viewed as the cause behind the enhancement of the ππ S-wave. We find that at large distances, the main contribution to the spin-orbit potential comes from the scalar Lagrangian and it is found to be attractive. We briefly discuss how to pursue this work to finally obtain a medium-range attractive interaction. |
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