Mainz 2012 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Poster – Hadronenstruktur und -spektroskopie
HK 45.6: Poster
Thursday, March 22, 2012, 14:00–16:00, P Foyer
Total and Differential Cross Sections of the Reaction pd→3He+η at 49 an 60 MeV Excess Energy* — •Florian Bergmann, Annika Passfeld, Kay Demmich, Paul Goslawski, Christina Husmann, Alfons Khoukaz, and Alexander Täschner — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster
The p+d→3He+η reaction has been used recently for various precision experiments, e.g. for the investigation of the η-nucleus final state interaction, the search for possible η-mesic nuclei as well as for the η-mass determination with highest accuracy. A remarkable feature of this reaction is the unexpected shape of the excitation function which is strongly influenced by the η-3He final state interaction. While close to threshold (Q≤ 11 MeV) a rich data sample has been provided a short time ago, only limited information are available at higher excess energies. Therefore, new measurements at Q = 49 and 60 MeV with high statistics have been performed at the WASA-at-COSY experiment. Final results on total and differential cross sections will be presented and discussed.
*Supported by COSY-FFE grants