Gießen 2007 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 35: Elektromagnetische und Hadronische Sonden
HK 35.5: Talk
Wednesday, March 14, 2007, 18:00–18:15, A
Study of the η and η′ meson production in the quasi-free proton-neutron reactions at COSY-11 — •Barbara Rejdych, Rafal Czyzykiewicz, Pawel Moskal, and Joanna Przerwa for the COSY-11 collaboration — Institute of Physics, Jagellonian University, 30-059 Cracow, Poland
Using a proton beam and a deutron target the quasi-free p n→ p n η , p n→ p n η′ and the p n→ d η′ reactions have been measured at the COSY-11 facility. The experiments have been performed in order to study an isospin dependence of the total cross section for the η and η′ meson production in nucleon-nucleon collisions. These data, together with previous results obtained for the production of the mesons in collisions of protons should reduce significantly the ambiguities of theortical descriptions of the production mechanism of the η′ meson production in the nucleon-nucleon interaction.
The data taking has been completed in February 2006. Preliminary results will be presented and discussed. The presentation will include a description of the experimental technique used as well as the method invented for the separation of contributions from the multi- and single-meson production in the missing mass spectra of the quasi-free pn→ pnX process extracted from the measured pd → pnX pspectator reactions [1].
[1] P. Moskal et al., J. Phys. G 32 (2006) 629.