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HK: Fachverband Physik der Hadronen und Kerne
HK 58: Hadronenstruktur und -spektroskopie IX
HK 58.1: Gruppenbericht
Donnerstag, 24. März 2011, 16:30–17:00, C-2
(contribution withdrawn) Hadron Phenomenology: Glueball, Vector and Axial-Vector Mesons and Baryons in a Linear Sigma Model — •Denis Parganlija1, Francesco Giacosa1, Stanislaus Janowski1, Susanna Gallas1, Peter Kovacs2, György Wolf2, and Dirk H. Rischke1,3 — 1Institut für Theoretische Physik, Goethe-Universität, Max-von-Laue-Str. 1, D–60438 Frankfurt am Main — 2Research Institute for Particle and Nuclear Physics, H–1525 Budapest, POB 49, Ungarn — 3Frankfurt Institute for Advanced Studies, Goethe-Universität, Ruth-Moufang-Str. 1, D–60438 Frankfurt am Main
We study the vacuum phenomenology of low-energy hadrons in a globally chirally invariant linear sigma model with vector, axial-vector, glueball and baryon degreees of freedom. We present results regarding (i) spectroscopy of scalar quark-antiquark mesons (identification of scalar quarkonia from experimental data, decays of quarkonia), (ii) mixing between scalar q q states and the glueball (identification of predominantly glueball state from experimental data) and (iii) origin of nucleon mass (mass of the nucleon in the chiral limit) and the chiral partner of the nucleon. We also outline an extension of the model to include tetraquark degrees of freedom and charmed hadrons and present an outlook of calculations at finite temperatures and densities.