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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

V. I. Kukulin·V. N. Pomerantsev·M. Kaskulov·Amand Faessler
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Abstract

A multi-component formalism is developed to describe three-body systems with nonstatic pairwise interactions and non-nucleonic degrees of freedom. The dressed-bag model for $NN$ interaction based on the formation of an intermediate six-quark bag dressed by a $σ$-field is applied to the $3N$ system, where it results in a new three-body force between the six-quark bag and a third nucleon. Concise variational calculations of $3N$ bound states are carried out in the dressed-bag model including the new three-body force. It is shown that this three-body force gives at least half the $3N$ total binding energy, while the weight of non-nucleonic components in the $^3$H and $^3$He wavefunctions can exceed 10%. The new force model provides a very good description of $3N$ bound states with a reasonable magnitude of the $σNN$ coupling constant. The model can serve as a natural bridge between dynamical description of few-nucleon systems and the very successful Walecka approach to heavy nuclei and nuclear matter.

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V. I. Kukulin, V. N. Pomerantsev, M. Kaskulov, Amand Faessler. 2004-01-29. The properties of the three-nucleon system with the dressed-bag model for nn interaction. I: New scalar three-body force. https://doi.org/10.1088/0954-3899%2F30%2F3%2F005

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