SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 55: Instrumentation XIV
HK 55.4: Vortrag
Donnerstag, 23. März 2023, 15:00–15:15, SCH/A251
Studies of the Unified Tracking Station for the Proton Radius Measurement in High-Energy Elastic Muon-Proton Scattering at AMBER* — •Christian Dreisbach, Karl Eichhorn, Jan Friedrich, Igor Konorov, Martin Losekamm, Stephan Paul, and Thomas Pöschl for the AMBER collaboration — 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 realized with 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. In addition to the precise measurement of the recoil proton provided by the TPC, novel unified tracking stations (UTS) are foreseen for an accurate measurement of the muon trajectory. Scintillating Fiber Hodoscopes joint with monolithic silicon-pixel detectors will be combined in this UTS. A first prototype was built and a beam test was performed in 2022. We present ongoing studies and results on the tracking capability of the UTS.
*funded by the DFG under Germany’s Excellence Strategy - EXC2094 - 390783311