| Issue |
EPJ Web Conf.
Volume 218, 2019
The 11th International Workshop on e+e− Collisions from Phi to Psi (PhiPsi 2017)
|
|
|---|---|---|
| Article Number | 03002 | |
| Number of page(s) | 6 | |
| Section | γγ Physics and Transition form Factors | |
| DOI | https://doi.org/10.1051/epjconf/201921803002 | |
| Published online | 18 October 2019 | |
https://doi.org/10.1051/epjconf/201921803002
Recent Results on Meson Decays from A2
Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
* e-mail: padlarso@uni-mainz.de
Published online: 18 October 2019
Light meson decays are used to investigate topics related to fundamental aspects of particle physics. Precision measurements of meson Dalitz decays give input to theoretical evaluations of the Hadronic Light-by-Light contribution (HLbL) to the anomalous magnetic moment of the muon. The A2 collaboration, using the Crystal Ball/TAPS setup at MAMI, has recently published several high precision results on transition form factors which are related to HLbL. Pseudoscalar η’ decays allow for studies of topics like ππ scattering lengths, effective field theories and fundamental symmetries. In 2014 the collaboration had a dedicated experimental campaign with one of its main goals to measure the dynamics of η’→ π0π0η with high precision. A brief overview of the experimental setup, physics motivations, analyses and results are given.
© The Authors, published by EDP Sciences, 2019
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