Speaker
Dr
Lena Heijkenskjöld
(Institut für Kernphysik, Johannes Gutenberg Universität Mainz)
Description
Decays of the light mesons $\pi^0\$, $\eta$, $\omega$, and $\eta'$ provide a unique laboratory to test fundamental aspects of hadron physics. Precision studies of such diverse topics as the light quark mass ratio, $\pi-\pi$ scattering lengths, and searches for physics beyond the Standard Model are possible. Additionally, their Dalitz decays provide a way of measuring the electromagnetic meson Transition Form Factors (TFFs) in the time-like region. Precise knowledge of pseudoscalar TFFs is vital for the precision frontier of the Standard Model as they are needed as experimental input in calculations of the hadronic Light-by-Light contribution to the anomalous magnetic moment of the muon.
The A2 tagged photon facility at the Mainz Microtron (MAMI) provides a high yield of light mesons produced by photo-induced reactions on protons. It makes the experiment ideal for high precision measurements of meson decays. The experimental setup utilises the Bremsstrahlung distribution of the A2 photon beam, produced from the MAMI electron beam, along with a system of detectors that nearly covers the full solid angle.
This talk will highlight the recent contributions as well as ongoing studies by the A2 collaboration in the field of light meson interactions.
Primary author
Dr
Lena Heijkenskjöld
(Institut für Kernphysik, Johannes Gutenberg Universität Mainz)
