Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 31: Elektromagnetische und Hadronische Proben
HK 31.6: Vortrag
Dienstag, 8. März 2005, 17:45–18:00, TU MA004
Investigation of the a0(980)/f0(980)-resonances with ANKE at COSY* — •Alexey Dzyuba1, Markus Büscher2, Vera Kleber3, and Vladimir Koptev1 — 1Petersburg Nuclear Physics Institut, Gatchina, Russia — 2Institut für Kernphysik, Forschungszentrum Jülich — 3Institut für Kernphysik, Universität zu Köln
The production of the lightest scalar resonances a0(980) and f0(980) in hadronic interaction is being investigated with the ANKE spectrometer, where their decays into KK can be observed. Final goal of these studies, which will be later supplemented by measurements of the non-strange decays with the WASA detector, is to learn about the nature of these states, about isospin violating processes in the a0/f0 system, FSI effects between antikaons and light nuclei. In this talk results of the data analysis for the reaction pp→ da0+ → dK+K^0 measured at a beam energy Tp=2.83 GeV will be presented. Total cross-sections, invariant-mass and angular distributions will be shown and compared with theoretical predictions. Preliminary results from our beam times aiming at a0/f0 production in the reactions pn→ da00/f0 → dK+K− and dd→ α f0→α K+K− will also be discussed. * supported by FZJ, DFG, BMBF, RFFI