Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 43: Hadronenstruktur und -spektroskopie VIII
HK 43.10: Vortrag
Mittwoch, 23. März 2011, 18:45–19:00, HS3
Investigation of the 3He + η final state at 49 and 60 MeV excess energy* — •Annika Passfeld, Florian Bergmann, Kay Demmich, Paul Goslawski, Christina Husmann, Alfons Khoukaz, Tobias Rausmann, Alexander Täschner, and Alexander Winnemöller — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster
The excitation function of the pd → 3He + η reaction shows remarkable features close to the production threshold. Within the first 1 MeV of excess energy the total cross section rapidly increases to a maximum which can be attributed to a possible η bound state. Within the next 100 MeV excess energy the total cross section was observed to be almost constant. However, data provided by the COSY-GEM collaboration indicate a possible enhancement at Q= 49 MeV. Therefore, new data with high statistics have been taken at the WASA-at-COSY facility at Q= 49 MeV as well as at 60 MeV to investigate this situation in detail. Total and differential cross sections have been determined. The obtained results will be presented and compared to existing data.
*Supported by COSY-FFE grants