Münster 2011 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 12: Hadronenstruktur und -spektroskopie IV

HK 12.6: Talk

Monday, March 21, 2011, 18:00–18:15, HS3

Analysis of diffractive dissociation of exclusive K⁻ π⁺ π⁻ events in the high energetic hadron beam of the COMPASS-experiment — •Prometeusz Jasinski — Institut für Kernphysik, Universität Mainz, Johann-Joachim-Becherweg 45, 55099 Mainz

In order to study the production of exotic mesons the COMPASS experiment at CERN took data with a 190 GeV/c hadron beam hitting a liquid hydrogen target in the years 2008 and 2009. The negative hadron beam contains mainly pions and a small fraction of about 2.5% of kaons. Kaons are identified using CEDAR PID detectros in the beamline. One of the channels of interest is diffractively produced resonance decaying into the K⁻ π⁺ π⁻ final state. I will discuss the data selection and quality studies for this channel. The invariant mass spectra show already the well known resonances as the K₁(1270) K₁(1400) and the K₂(1770). To disentangle all contributing resonances techniques of partial wave analysis are applied. A short review on this studies will be presented.

Supported by BMBF under the contract 06MZ224