München 2019 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 40: Hadron Structure and Spectroscopy VI
HK 40.4: Vortrag
Mittwoch, 20. März 2019, 17:30–17:45, HS 13
Hadronic decays of the excited pseudoscalar glueball, hybrid mesons and charmonium states — •Walaa Eshraim1, Stefan Schramm2, Christian Fischer3, and Francesco Giacosa4 — 1Institute for Theoretical Physics, Goethe University, Max-von-Laue-Str. 1, D 60438 Frankfurt am Main, Germany — 2Frankfurt Institute for Advanced Studies, Goethe University, Ruth-Moufang-Str. 1, D 60438 Frankfurt am Main, Germany — 3Institut für Theoretische Physik, Justus-Liebig-Universität Giessen, 35392 Giessen, Germany — 4Institute of Physics, Jan Kochanowski University, ul. Swietokrzyska 15, 25-406 Kielce, Poland.
We study three different chiral Lagrangians that describe the two- and three-body decays of an excited pseudoscalar glueball, JPC = 0*−+, into light mesons and charmonium states as well as into a scalar and pseudoscalar glueball. We compute the decay channels for an excited pseudoscalar glueball with a mass of 3.7 GeV and consider a ground state pseudoscalar glueball of mass 2.6 GeV, following predictions from lattice QCD simulations. Furthermore, we enlarge the extended Linear Sigma Model (eLSM) by including nonets of low-lying hybrids in a chiral invariant frameowrk. Then, we predict the masses and decay modes of the (lightest) hybrid states in the framework (eLSM). Moreover, we calculate the two- and three-body decays of the ground-state (pseudo-)scalar charmonia ηc and χc0 in the framework of a U(4)r× U(4)l symmetric linear sigma model with (pseudo-)scalar and (axial-) vector mesons.