The proton radius puzzle started in 2010 when the CREMA collaboration measured the proton charge radius with muonic atoms and found a 7σ discrepancy with the CODATA value. Since then multiple experiments aimed at measuring the proton charge radius have been performed, and the results are inconclusive. MUSE aims to measure the proton radius using simultaneous electron-proton and muon-proton scattering. This simultaneous measuring is the first of its kind, and aims to be the most precise muon-proton scattering measurement in the kinematic region sensitive to the proton charge radius. MUSE is about to begin full production running in summer 2021 and aims to run for 6 months in both 2021 and 2022.

The technical design report for MUSE can be found here: https://arxiv.org/abs/1709.09753

The work is supported by NSF Award PHY 2012114.
 

 

 

 

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