Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 11: Poster Session: Electromagnetic and Hadronic Probes

HK 11.14: Poster

Tuesday, March 9, 2004, 13:30–15:30, Foyer

Study of the d − η interaction via dp→ dpη reaction — •C. Piskor-Ignatowicz — Institute of Physics, Jagellonian University, Cracow, PL-30-059 Poland

Recently the deuteron-η interaction was intensively studied on theoretical ground. This topic is of special interest due to the possible existence of η-nucleus bound or quasibound states. The COSY-11 collaboration preformed measurements of the near-threshold η meson production in the dp→ dpη reaction. The aim of the experiment was the investigation of the d−η interaction by studying the energy dependence of the total reaction cross section as well as Dalitz plot distributions for the final state particles. Measurements were preformed for four excess energies in the range from 0.2 MeV to 9.6 MeV. The momenta of the outgoing protons and deuterons were registered with the COSY-11 detection system and the η-mesons were identified via the missing mass method. Preliminary results of these measurements will be presented.

Supported by Forschungszentrum Jülich.