Nucleon-nucleon scattering in a chiral constituent quark model

Abstract

We study the nucleon-nucleon interaction in a chiral constituent quark model by using the resonating group method, convenient for treating the interaction between composite particles. The calculated phase shifts for the 3S1 and 1S0 channels show the presence of a strong repulsive core due to the combined effect of the quark interchange and the spin-flavour structure of the effective quark-quark interaction. Such a symmetry structure stems from the pseudoscalar meson exchange between the quarks and is a consequence of the spontaneous breaking of the chiral symmetry. We perform single and coupled channel calculations and show the role of coupling of the $\Delta \Delta$ and hidden color CC channels on the behaviour of the phase shifts.

27 pages, 2 Tables, 4 eps Figures, with RevTeX

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• The properties of the three-nucleon system with the dressed-bag model for nn interaction. I: New scalar three-body force
• Isoscalar short-range current in the deuteron induced by an intermediate dibaryon
• Renormalization of chiral two-pion exchange NN interactions with Delta-excitations: Central Phases and the Deuteron
• A dressed bag model study of the final-state $N\Delta$ interaction in photoproduction processes off the deuteron
• Dibaryon model for nuclear force and the properties of the $3N$ system
• Nucleon-nucleon wave function with short-range nodes and high-energy deuteron photodisintegration
• A six-quark dressed-bag description of np -> d γradiative capture
• Toy model of the Nucleon - Nucleon potential