München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 3: Hadron Structure and Spectroscopy I

HK 3.4: Talk

Monday, March 18, 2019, 15:15–15:30, HS 13

Measurement of the π⁰ transition form factor at MAMI — •Luigi Capozza^1,2,3, Alaa Dbeyssi¹, Frank Maas^1,2,3, Oliver Noll^1,2, David Rodríguez Piñeiro¹, Sahra Wolff^1,2, and Manuel Zambrana^1,2 — 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, data on the π⁰ transition form factor, parametrising the effective coupling of the neutral pion with the electromagnetic field, are useful. One way to access this form factor is measuring the π⁰ electroproduction cross section in the Primakoff kinematical regime. Feasibility studies for this measurement by upgrading the A1 facility at MAMI with the PANDA backward calorimeter within the framework of the phase 0 of the FAIR project will be reported.