Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 49: Hadron Structure and Spectroscopy VI
HK 49.4: Vortrag
Donnerstag, 13. März 2025, 16:45–17:00, HS 3 Physik
Measurement of the π0 transition form factor at MAMI — •Luigi Capozza1,2, Frank Maas1,2,3, Oliver Noll1,2, Christoph Rosner1,2, Paul Schöner1,2, and Sahra Wolff1,2 — 1Helmholtz-Institut Mainz, Mainz, Germany — 2Institute of Nuclear Physics, Mainz, Germany — 3PRISMA Cluster of Excellence, Mainz, Germany
An important uncertainty on the hadronic corrections to the anomalous magnetic moment of the muon comes from the so-called "light-by- light scattering" contributions. To estimate such contributions in data driven approaches, measurements of the π0 electromagnetic transition form factor, parametrising the effective coupling of the neutral pion to the electromagnetic field, are needed. One way to access this form factor is measuring the π0 electroproduction cross section in the Primakoff kinematical regime. Such a measurement has been set up at MAMI featuring a modified version of the PANDA backward calorimeter, installed at forward angles in the A1 electron scattering facility. A status report on this experiment will be presented.