Ongoing Data Analysis for the MUSE Calorimeter

The MUon Scattering Experiment (MUSE) is motivated by the proton radius puzzle, which emerged in 2010 from an atypically small proton charge radius measurement obtained via muonic hydrogen spectroscopy, and which has deepened with subsequent conflicting results across various scattering and spectroscopy experiments. MUSE aims to shed more light on this puzzle by extracting proton radius measurements from simultaneous electron-proton and muon-proton elastic scattering. A mixed beam of electrons, muons, and pions is fired at a liquid hydrogen target, and event data is collected via several beamline and scattering detectors. This talk focuses on the lead-glass calorimeter at the end of the beamline, which is designed to improve radiative corrections to MUSE's cross-section data. An overview is given of the calorimeter's setup and function, and analysis of energy deposition in the calorimeter as a function of beam rate and run momentum is discussed. This analysis is used to verify and improve MUSE's GEANT4 simulation, as well as to monitor the stability of the calorimeter through data-taking periods.