Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Hadronenstruktur und -spektroskopie V

HK 25.1: Vortrag

Dienstag, 16. März 2010, 16:30–16:45, HG III

Central Production in the four charged pion channel at the COMPASS experiment — •Johannes Bernhard — Institut für Kernphysik, 55099 Mainz

The COMPASS experiment focused its physics program recently on light meson spectroscopy. As a fixed target experiment at the CERN SPS accelerator, COMPASS features large acceptance and high momentum resolution and thus qualifies well for studies of diffractive dissociation and central production. Meson formation with both a 190 GeV π⁻ and a 190 GeV proton/π⁺ beam on liquid hydrogen, lead and copper was studied in 2008 and 2009. Centrally produced final states inhere the possibility to concentrate on glue-rich resonances and glueballs. The exploration of final states with four charged pions is well suited to search for such objects, and will help to introduce new arguments in the long-standing discussion.

In this talk we will present the status of all activities at COMPASS concerning centrally produced pionic final state events and ideas of their treatment in a dedicated partial wave analysis as well as first preliminary results.

supported by the BMBF