The Physics Program of MUSE
ORAL
Abstract
The MUon Scattering Experiment (MUSE) at the Paul Scherrer Institute (PSI) seeks to address
the proton radius puzzle by performing simultaneous high-precision measurements of elastic
electron-proton and muon-proton scattering. Measurements of the proton charge radius will be
obtained from a beam of both positively and negatively charged particles from a mixture of
electrons, muons, and pions. The experiment runs at beam momenta of 115, 160, and 210
MeV/c. The unique setup of MUSE allows for a direct muon/electron scattering cross section
comparison with coverage of a low-Q2 region of Q2 = 0.002 to 0.082 GeV2 for sensitivity to the
proton charge radius and for the study of possible two-photon exchange mechanisms by
comparing lepton charges. In addition, the experiment is collecting pion-proton elastic scattering
data. The MUSE experiment has recently begun to collect production-quality data. An overview
of the MUSE experiment and current status will be given.
the proton radius puzzle by performing simultaneous high-precision measurements of elastic
electron-proton and muon-proton scattering. Measurements of the proton charge radius will be
obtained from a beam of both positively and negatively charged particles from a mixture of
electrons, muons, and pions. The experiment runs at beam momenta of 115, 160, and 210
MeV/c. The unique setup of MUSE allows for a direct muon/electron scattering cross section
comparison with coverage of a low-Q2 region of Q2 = 0.002 to 0.082 GeV2 for sensitivity to the
proton charge radius and for the study of possible two-photon exchange mechanisms by
comparing lepton charges. In addition, the experiment is collecting pion-proton elastic scattering
data. The MUSE experiment has recently begun to collect production-quality data. An overview
of the MUSE experiment and current status will be given.
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Presenters
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Anne Flannery
University of South Carolina
Authors
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Anne Flannery
University of South Carolina