Mainz 2012 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Hadronenstruktur und -spektroskopie
HK 23.5: Talk
Wednesday, March 21, 2012, 15:15–15:30, RW 2
OZI rule violation and spin alignments in vector meson production at COMPASS — •Johannes Bernhard — for the COMPASS collaboration — Institut für Kernphysik, Johannes-Gutenberg-Universität, Johann-Joachim-Becher-Weg 45, 55099 Mainz
The COMPASS collaboration at CERN dedicated the 2008 and 2009 run time to meson spectroscopy measurements. At 190 GeV/c beam momentum, both diffractice and double-diffractice production mechanisms overlap which can be explored with vector meson production studies. We present results for spin alignments of ω(782) and φ(1020) depending on xF and t alongside with systematics of the event selection. In addition, we find an OZI rule violation of a factor of 3 in the comparision of yields for pp → pp ω and pp → pp φ.