Erlangen 2026 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 11: Hadron Structure and Spectroscopy III

HK 11.7: Talk

Tuesday, March 17, 2026, 18:15–18:30, PHIL C 301

Energy Calibration of an Electromagnetic Calorimeter for the PRIMA Experiment at MAMI — Òscar Andújar Sabán¹, Ning Cao¹, Luigi Capozza¹, Jonas Geisbüsch¹, Ravi Gowdru Manjunata¹, Frank Maas^1,2,3, Antoine Martinet¹, Oliver Noll^1,2, Paul Schöner¹, Christoph Rosner¹, •Pierre Vijayan¹, and Sahra Wolff¹ for the PANDA collaboration — ¹Helmholtz-Institut Mainz, Mainz, Germany — ²Institute of Nuclear Physics, Mainz, Germany — ³PRISMA+ Cluster of Excellence, Mainz, Germany

The PRIMA experiment which was conducted at the MAMI accelerator facility in Mainz aims to measure the doubly virtual transition form factor (TFF) of the π⁰ via the π⁰-electroproduction in the Primakoff kinematics. A modified version of the PANDA backward calorimeter (EMC) was installed in the A1 spectrometer hall at MAMI, for detecting both the scattered electron and the π⁰ decay γ-particles. The experiment will give new input to the hadronic corrections of the anomalous magnetic moment of the muon (g_µ-2 puzzle). In order to achieve a precise measurement of the TFF, the kinematics of this process needs to be determined with high precision.
For this purpose, a reliable energy calibration procedure of the EMC is mandatory. The talk therefore gives insight into the energy calibration of the electromagnetic calorimeter for the PRIMA-setup at MAMI.

Keywords: Hadron structure, Data analysis