A hybrid-chiral soliton model with broken scale invariance for nuclear matter

Abstract

We present a model for describing nuclear matter at finite density based on quarks interacting with chiral fields, σ and π. The chiral Lagrangian also includes a logarithmic potential, associated with the breaking of scale invariance. We provide results for the soliton in vacuum and at finite density, using the Wigner-Seitz approximation. We show that the model can reach higher densities respect to the Linear-σ model, up to ρ ≈ 3ρ0 for mσ = 1200 MeV.