Münster 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 38: Hadron Structure and Spectroscopy V
HK 38.5: Vortrag
Donnerstag, 30. März 2017, 15:15–15:30, F 5
Studies on η production in pd fusion to 3Heη with WASA-at-COSY* — •Nils Hüsken, Florian Bergmann, Kay Demmich, and Alfons Khoukaz for the WASA-at-COSY collaboration — Westfälische Wilhelms-Universität Münster, Münster, Germany
The production of η mesons in proton-deuteron fusion to 3Heη has been studied for a long time. As the attractive s-wave η N potential causes a strong final state interaction between the 3He-nucleus and the η-meson, the near threshold region has received considerable attention already and is still subject to active research. Away from threshold, the available database is more sparse with detailed comparisons being hindered by systematics between the different experiments. Various theoretical models have tried to describe both the total as well as the differential cross section observed by different experiments, with none of them being regarded as the generally accepted model for η production away from threshold. Our new measurement performed with the WASA-at-COSY experiment covers 15 excess energies in the region between Q≈ 13 MeV and Q≈ 81 MeV, allowing a detailed study of the development of differential distributions with rising excess energy with minimal systematics, therefore acting as a valuable benchmark to existing and future theoretical models. The current status of the ongoing analysis will be presented along with future possibilities the dataset presents. *Supported by FFE program of the Forschungszentrum Jülich, the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n 283286 and the Deutsche Forschungsgemeinschaft (DFG) through the Research Training Group GRK2149.