The MUSE Measurement of the Proton Radius at PSI $\pi$M1: Overview
ORAL
Abstract
The Proton Radius Puzzle, the difference between the proton radius measured using muonic hydrogen and the same quantity measured using atomic hydrogen and electron-proton elastic scattering, remains unresolved after three years. The MUon proton Scattering Experiment (MUSE) at the Paul Scherrer Institut (PSI) $\pi$M1 beam line is intended to help resolve the Puzzle through measurements of $\mu^{\pm}p$ and $e^{\pm}p$ elastic scattering. Measuring scattering of electrons and muons at the same time should provide a direct $e$/$\mu$ comparison with reduced systematic uncertainties. Measuring with both positive and negative beam charges allows two-photon exchange contributions to be studied. This talk will provide an overview of the MUSE motivation, measurements, schedule and expected results.
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Authors
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Evangeline J. Downie
The George Washington University