Properties of hadrons in a chiral model with (axial-)vector mesons

Abstract

Recent advances in the development of a chiral linear $\sigma$-model with (axial-)vector mesons are presented. The model is based on the basic requirements of global chiral symmetry and dilatation invariance. The role of (axial-)vector states turns out to be crucial both in the meson and the baryon sectors. First results at nonzero temperature and density are discussed.

Comments: 7 pages. Based on the presentation given at the International School of Nuclear Physics, "From Quarks and Gluons to Hadrons and Nuclei", Erice (Sicily/ Italy), 16-24 September 2011