Meson vacuum phenomenology in a three-flavor linear sigma model with   (axial-)vector mesons
  We study scalar, pseudoscalar, vector, and axial-vector mesons with non-strange and strange quantum numbers in the framework of a linear sigma model with global chiral $U(N_f)_L \times U(N_f)_R$ symmetry. We perform a global fit of meson masses, decay widths, as well as decay amplitudes. The quality of the fit is, for a hadronic model that does not consider isospin-breaking effects, surprisingly good. We also investigate the question whether the scalar $\bar{q}q$ states lie below or above 1 GeV and find the scalar states above 1 GeV to be preferred as $\bar{q}q$ states. Additionally, we also describe the axial-vector resonances as $\bar{q}q$ states. 
Denis Parganlija (Vienna, Tech. U. and Frankfurt U.), Peter Kovacs   (Frankfurt U. and Budapest, RMKI), Gyorgy Wolf (Budapes...
hep-ph nucl-th