SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 48: Hadron Structure and Spectroscopy V
HK 48.4: Vortrag
Mittwoch, 22. März 2023, 18:15–18:30, SCH/A316
Study of Elastic Muon-Electron Scattering as Energy Calibration Process for the Proton Radius Measurement at AMBER* — Christian Dreisbach, Karl Eichhorn, Jan Friedrich, •Simon Helbing, Igor Konorov, Martin Losekamm, Stephan Paul, and Thomas Pöschl — Technische Universität München, Physik-Department E18, Garching, Germany
The proton radius can be determined by measuring the slope of the electric form factor GE at small squared four-momentum transfer Q2. Numerous elastic scattering and laser spectroscopy measurements of the proton radius have been performed with contradicting results – the so-called proton radius puzzle. We propose to measure the proton radius in high-energy elastic muon-proton scattering at the M2 beam line of CERN’s Super Proton Synchrotron in the year 2023. A high-precision measurement at low Q2 implemented using a high-pressure hydrogen TPC can contribute to a solution of the puzzle, especially in view of the systematics of this approach compared to electron scattering. The kinematic relation in elastic muon-electron scattering is foreseen as calibration process for the momentum of the incoming muon. Data collected in a pilot run in 2021 is used to study the resolutions and methods under comparable conditions to the proposed setup. We present results of the ongoing analysis and developments towards a possible application in the final setup.
*funded by the DFG under Germany’s Excellence Strategy - EXC2094 - 390783311