Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 44: Hadronenstruktur und -spektroskopie
HK 44.1: Gruppenbericht
Dienstag, 5. März 2013, 16:45–17:15, HSZ-403
A chiral model with (axial-)vector mesons and glueballs: meson and baryon phenomenology — •Francesco Giacosa1, Susanna Gallas1, Denis Parganlija1,2, Stanislaus Janowski1, Achim Heinz1, Walaa I. Eshraim1, Khaled Teilab1, Peter Kovacs3, Gyuri Wolf3, and Dirk H. Rischke1,4 — 1Inst. for Theor. Physics, Johann Wolfgang Goethe University, Max-von-Laue-Str. 1, D-60438 Frankfurt am Main, Germany — 2Inst. for Theor. Physics, Vienna University of Technology, Wiedner Hauptstr. 8-10, A-1040 Vienna, Austria — 3Inst. for Particle and Nuclear Physics, Wigner Research Center for Physics, Hungarian Academy of Sciences, H-1525 Budapest, Hungary — 4Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1 D-60438 Frankfurt am Main, Germany
We present an effective model for low-energy hadron phenomenology, called extended linear sigma model (eLSM), which is based on chiral symmetry and dilatation invariance. The d.o.f. in the mesonic sector are the (pseudo)scalar and (axial-)vector quark-antiquark fields, as well as the scalar and the pseudoscalar glueballs. A good description of the existing PDG data on masses and decay widths is achieved and predictions for future experiments are shown. In the baryonic sector the nucleon doublet (the nucleon and and its chiral partner) are introduced through the mirror assignment: in this way a contribution to the nucleon mass, which does not originate from the chiral condensate, is possible and turns out to be sizable. Decays and scattering processes involving nucleons are presented. In the end, an outlook for future studies in both the mesonic and baryonic sectors is discussed.