A chiral quark-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, \sigma and \pi and with vector mesons introduced as massive gauge fields. The chiral Lagrangian 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-\sigma model and that the introduction of vector mesons allows to obtain saturation. This result was never obtained before in similar approaches.