The new mechanism for intermediate- and short-range nucleon-nucleon interaction

Abstract

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.

56 pages, 10 Postscript figures, corrected formulas and figures

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• Description of intermediate- and short-range NN nuclear force within a covariant effective field theory
• Deuteron-Proton Elastic Scattering at Intermediate Energies
• The properties of the three-nucleon system with the dressed-bag model for nn interaction. I: New scalar three-body force
• Correlated two-pion exchange and large-N(C) behavior of nuclear forces
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• A dressed bag model study of the final-state $N\Delta$ interaction in photoproduction processes off the deuteron
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• Dibaryon resonances and short-range $NN$ interaction
• To the nature of nuclear force
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• $P$-wave dibaryon resonances in $pp$ elastic scattering and near-threshold pion production
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• The reaction $\Delta +N\to N+N+\varphi$ in ion-ion collisions
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