Meson vacuum phenomenology in a three-flavor linear sigma model with (axial-)vector mesons

Parganlija, D. and Kovács, Péter and Wolf, György and Giacosa, F. and Rischke, D. H. (2013) Meson vacuum phenomenology in a three-flavor linear sigma model with (axial-)vector mesons. PHYSICAL REVIEW D, 87 (1). ISSN 2470-0010

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Abstract

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 (Nf )L × U (Nf )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 ¯qq states lie below or above 1 GeV and find the scalar states above 1 GeV to be preferred as ¯qq states. Additionally, we also describe the axial-vector resonances as ¯qq states.

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