Münster 2011 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 12: Hadronenstruktur und -spektroskopie IV

HK 12.3: Talk

Monday, March 21, 2011, 17:15–17:30, HS3

Vector meson production and OZI violation at COMPASS — •Johannes Bernhard — for the COMPASS collaboration
Institut für Kernphysik Mainz, Johannes-Gutenberg-Universität
Johann-Joachim-Becher-Weg 45, 55099 Mainz

The COMPASS spectroscopy program with 190 GeV/c hadron beams in 2008 and 2009 focused mainly on questions related to mesonic resonances. The rich data set allows for precision studies on known resonances, as well as for a search of spin-exotic states and resonances with gluonic degrees of freedom. As a part of this program, we present a first analysis of vector meson production in p p → p X p, where X=ω,φ is detected within the same experimental setup and trigger configuration. The ratio of the differential cross sections of both channels allows to investigate the degree of a possible violation from the Okubo-Zweig-Iizuka rule, which has not been measured within this energy range before. The event selection, background estimation and angular dependencies will be discussed.