Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 46: Hadron Structure and Spectroscopy VI
HK 46.6: Vortrag
Donnerstag, 30. März 2017, 18:30–18:45, F 5
Upper limit of the η-decay η→π0 + e+ + e− with WASA-at-COSY* — •Florian Bergmann, Kay Demmich, Nils Hüsken, and Alfons Khoukaz for the WASA-at-COSY collaboration — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Germany
Investigations on symmetries and symmetry breaking allow for a better
understanding of the physics within the standard model. The study of
rare meson decays is an elegant way to search for violation of
conservation laws, and hence symmetry breaking effects. An extensive physics
program on η-meson decays has been performed as part of the WASA-at-COSY
experiment. Due to the high statistics of the measurements new limits
on e.g., the C, P and T symmetry breaking or combinations thereof
can be determined.
This contribution will present recent results of the analysis of the
C-violating η-decay η→π0 + e+ + e− using the
high statistics p+d→3He+η data obtained with WASA-at-COSY.
In a further contribution by the WASA-at-COSY collaboration insights on the
analysis based on the p+p→ p+p+η data, also obtained with WASA-at-COSY,
will be given.
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*Supported by FFE program of the Forschungszentrum Jülich.