The nucleon–nucleon interaction and properties of the nucleon in a πρω soliton model including a dilaton field

We investigate an extended chiral soliton model which includes π,ρ,ω and σ mesons as explicit degrees of freedom. The Lagrangian incorporates chiral symmetry and broken scale invariance. A scalar–isoscalar σ-meson is associated with a quarkonium dilaton field with a mass mσ≈550…720 MeV. We show that the inclusion of the scalar field slightly changes the static and electromagnetic properties of the nucleon. In contrast, it plays a significant role in nucleon–nucleon dynamics and gives an opportunity to describe well the two-nucleon interaction.