On the origin of the short range NN repulsion

Details On the origin of the short range NN repulsion On the origin of the short range NN repulsion

1999-06-03

arxiv.org/abs/nucl-th/9906008v2

Phys.Lett.B477:59-65,2000

Physics

Nuclear Physics

Nuclear Theory

revised version to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(00)00230-6

We calculate S-wave singlet and triplet NN phase shifts stemming from the short-range flavor-spin hyperfine interaction between constituent quarks using the resonating group method approach. A strong short-range repulsion is found in both waves. A fair comparison is performed between the traditional picture, relying on the colour-magnetic interaction, and the present one, relying on the Goldstone boson exchange dynamics. It is shown that the latter one induces essentially stronger repulsion, which is a very welcome feature. We also study a sensitivity of phase shifts and wave function to extention from the one-channel to three-channel resonating group method approximation.

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