Isoscalar NN spin-orbit potential from a Skyrme model with scalar mesons

Details Isoscalar NN spin-orbit potential from a Skyrme model with scalar mesons Isoscalar NN spin-orbit potential from a Skyrme model with scalar mesons

1996-06-07

arxiv.org/abs/hep-ph/9606270v2

Z.Phys. A358 (1997) 85-89

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages (revtex) + 2 figures; use \psfig command. Minor changes in the text and some discussion added in the last section. To

Scientific paper

10.1007/s002180050280

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 \epsilon which can be viewed as the cause behind the enhancement of the $\pi \pi S$-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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