Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-12-30
J.Phys.G27:1851-1868,2001
Physics
Nuclear Physics
Nuclear Theory
56 pages, 10 Postscript figures, corrected formulas and figures
Scientific paper
10.1088/0954-3899/27/9/301
Arguments against the traditional Yukawa-type approach to $NN$ intermediate- and short-range interaction due to scalar-isoscalar meson exchange are presented. Instead of the Yukawa mechanism for intermediate-range attraction some new approach based on formation of the symmetric six-quark bag in the state $|(0s)^6[6]_X,L=0>$ dressed due to strong coupling to $\pi$, $\sigma$ and $\rho$ fields are suggested. These new mechanism offers a strong intermediate-range attraction which replaces the effective $\sigma$-exchange (or excitation of two isobars in the intermediate state) in traditional force models. A similar mechanism with vector $\rho$-meson production in the intermediate six-quark state is expected to lead to a strong short-range spin-orbital nonlocal interaction in the $NN$ system, which may resolve the long-standing puzzle of the spin-orbit force in baryons and in two-baryon systems. Illustrative examples are developed which demonstrate clearly how well the suggested new model can reproduce $NN$ data. Strong interrelations have been shown to exist between the proposed microscopic model and the one-component Moscow $NN$ potential developed by the authors previously and also with some hybrid models and the one-term separable Tabakin potential. The new implications of the proposed model for nuclear physics are discussed.
Faessler Amand
Kukulin Vladimir I.
Obukhovsky Igor T.
Pomerantsev V. N.
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