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HK: Fachverband Hadronen und Kerne
HK 47: Hadron Structure and Spectroscopy II
HK 47.3: Talk
Wednesday, March 18, 2009, 14:30–14:45, H-ZO 30
A Linear Sigma Model with Vector Mesons and Global Chiral Invariance — •Denis Parganlija1, Francesco Giacosa1, and Dirk H. Rischke1,2 — 1Institut für Theoretische Physik, Goethe-Universität, Max von Laue-Str. 1, D-60438 Frankfurt am Main, Germany — 2Institut für Theoretische Physik and Frankfurt Institute for Advanced Studies, Goethe-Universität, Max von Laue-Str. 1, D-60438 Frankfurt am Main, Germany
We calculate low-energy meson decay widths in a two-flavour linear sigma model with global chiral symmetry exploring two different assignments for scalar q-q states: (i) as f0(600) / a0(980) and (ii) as f0(1370) / a0(1450), respectively. We compare the consequences of each of those assignments with the experimental data. Results for pion-pion scattering lengths in both assignments are also discussed.