Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 24: Hadron Structure and Spectroscopy I
HK 24.4: Vortrag
Dienstag, 17. März 2009, 15:15–15:30, H-ZO 20
Diffractive Pion Dissociation into 5 Pion Final States at COMPASS — •Sebastian Neubert1, Suh-Urk Chung1,2, Jan Friedrich1, Stefanie Grabmüller1, Florian Haas1, Bernhard Ketzer1, Stephan Paul1, Dimitry Ryabchikov1,3, and Quirin Weitzel1 — 1Technische Universität München, Physik Department E18, 85748 Garching Germany — 2Brookhaven National Laboratory, Upton, NY 11973, USA — 3Institute for High Ernergy Physics, 142284 Protvino, Russia
COMPASS is a fixed-target experiment at the CERN SPS, which investigates the structure and spectroscopy of hadrons. In 2004, a first run with a 190 GeV/c π− beam took place using nuclear targets. Diffractive dissociation reactions observed in this run provide clean access to meson resonances with masses up to 3 GeV/c2 . Exclusive final states with 5 charged pions have been extracted. The covered range in momentum transfer extends from threshold to a few GeV2/c2 allowing to study resonance production in different regimes. We will report on the status of the analysis of this unique data set.