https://doi.org/10.1051/epjconf/202532000031
The MUSE Beam Line Calorimeter
1 Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ 08855, USA
2 Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794, USA
3 Center for Frontiers in Nuclear Science, Stony Brook University, Stony Brook, NY 11794, USA
* e-mail: win.lin@stonybrook.edu
Published online: 7 March 2025
The MUon proton Scattering Experiment (MUSE) at the PiM1 beam line of the Paul Scherrer Institute is simultaneously measuring the elastic scattering of electrons and muons from a liquid hydrogen target to extract the charge radius of the proton with both positive and negative beam polarities. In addition to providing precise data for addressing the proton radius puzzle, comparing the four scattering cross sections directly tests lepton universality, radiative corrections, and two-photon exchange effects for electrons and muons. In order to study radiative correction and get more precise incident lepton energy at the scattering vertex for the cross section measurements, MUSE uses a lead-glass calorimeter located at the downstream end of the beam line. This proceeding discusses the specifications and calibration process of the calorimeter detector. Data are compared to simulation to demonstrate the performance of the detector.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
