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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Hadron Structure and Spectroscopy VII

HK 57.1: Gruppenbericht

Freitag, 31. März 2017, 14:00–14:30, F 5

Studies of Meson Decays with the Crystal Ball/TAPS setup at MAMI — •Patrik Adlarson — Institut für Kernphysik, Johannes Gutenberg Universität, Mainz, Germany

Precision studies of light meson decays are used to investigate a wide range of topics related to fundamental aspects of hadron physics. Precision measurements of meson Dalitz decays give input to hadronic determinations of the light-by-light contribution to the anomalous magnetic moment of the muon. Pseudoscalar η^′ decays allow for studies of such diverse topics as ππ scattering lengths, the SU(3) singlet-octet mixing angle, effective field theory and fundamental symmetries. Recently, a large statistics sample of η^′ (ω) mesons have been produced and collected with the Crystal Ball/TAPS setup at MAMI. An overview of the physics motivations, the experimental setup and recent results are presented.