The MUSE Beamline Calorimeter

Abstract

The MUon Scattering Experiment (MUSE) was motivated by the proton radius puzzle arising from the discrepancy between muonic hydrogen spectroscopy and electron-proton measurements. The MUSE physics goals also include testing lepton universality, precisely measuring two-photon exchange contribution, and testing radiative corrections. MUSE addresses these physics goals through simultaneous measurement of high precision cross sections for electron-proton and muon-proton scattering using a mixed-species beam. The experiment will run at both positive and negative beam polarities. Measuring precise cross sections requires understanding both the incident beam energy and the radiative corrections. For this purpose, a lead-glass calorimeter was installed at the end of the beam line in the MUSE detector system. In this article we discuss the detector specifications, calibration and performance. We demonstrate that the detector performance is well reproduced by simulation, and meets experimental requirements.

References in corpus (6)

• A new event generator for the elastic scattering of charged leptons on protons
• A Liquid Hydrogen Target for the MUSE Experiment at PSI
• Timing Detectors with SiPM read-out for the MUSE Experiment at PSI
• Characterization of Muon and Electron Beams in the Paul Scherrer Institute PiM1 Channel for the MUSE Experiment
• Instrumental uncertainties in radiative corrections for the MUSE experiment
• Blinding for precision scattering experiments: The MUSE approach as a case study