Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 10: Structure of Baryons, Mesons I, Crystal Barrel Results

HK 10.4: Talk

Monday, March 16, 1998, 14:45–15:00, H

Final states of pp–annihilation into (KKπ)ππ at rest — •Burkhard Pick — Institut für Strahlen- und Kernphysik der Universität Bonn, Nußallee 14-16, 53115 Bonn

In April 1996 some 11 million events have been taken with the Crystal Barrel detector at the antiproton ring LEAR at CERN. A silicon vertex detector surrounding the liquid hydrogen target, in combination with a special trigger, has allowed the accumulation of events containing K_S’s decaying into π⁺π⁻.

The present analysis has selected 5-meson final states of the type (K_SKπ)ππ with 2 or 4 charged particles. A description of the reconstruction and Monte Carlo simulations underline the good quality of the data. First results concerning pseudoscalar mesons decaying into (KKπ) will be presented.