München 2019 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 57: Hadron Structure and Spectroscopy VIII
HK 57.2: Talk
Friday, March 22, 2019, 14:30–14:45, HS 13
Search for the Y(2175) in photo-production at GlueX — •Abdennacer Hamdi1,2, Klaus Götzen1, Frank Nerling1,2, and Klaus Peters1,2 — 1Institut für Kernphysik, J. W. Goethe-Universitat, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
Quantum Chromodynamics is the theory that describes how hadrons are built from quarks and gluons via the strong interaction. Many predictions have been observed, but many others are still pending and under experimental investigation. Of particular interest is how gluonic excitations give rise to exotic states. One class of such states are hybrid mesons that are predicted by theoretical models and Lattice Quantum Chromodynamics calculations. The Y(2175), as observed in electron-positron experiments, is discussed to be the strangeonium partner of the Y(4260), and thus a candidate for e.g. a hybrid meson or tetraquark state. We present the status and plans to search for this state in photo-production at the GlueX experiment in Jefferson Lab’s Hall D, which started physics data taking in 2016. This work is supported by HGS-HIRe.