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HK: Fachverband Physik der Hadronen und Kerne
HK 37: Hadron Structure and Spectroscopy 7
HK 37.6: Talk
Tuesday, March 24, 2015, 18:30–18:45, T/SR19
Investigating the pd→ 3Heη production cross section between Q ≈ 13.6 MeV and Q ≈ 80.9 MeV with WASA-at-COSY* — •Nils Hüsken, Florian Bergmann, Kay Demmich, Karsten Sitterberg, and Alfons Khoukaz — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Germany
In the near threshold region, the pd→ 3Heη reaction has been studied in great detail. At higher excess energies, however, the amount of available data is limited. While the data from the ANKE and WASA/PROMICE experiments expose a total cross section plateau, recent results from WASA-at-COSY suggest an unexpected narrow cross section variation at Q = 48.8 MeV. As the WASA-at-COSY experiment is perfectly suited to study the energy dependence of the total cross section, a beam time was realized in May 2014 in order to investigate the excess energy region of interest. The measurement covered 15 different beam momenta, resulting in a Q-value range between Q ≈ 13.6 MeV and Q ≈ 80.9 MeV. With the new data it will be possible to extract precise total and differential cross sections of the pd→ 3Heη reaction for all 15 excess energies.
First results on the pd→ 3Heη reaction will be presented as well as an outline for the future possibilities the new data presents.
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*Supported by FFE program of the Forschungszentrum Jülich and the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n 283286.