Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session R09: Proton Charge Radius and Low-Energy Properties.
1:30 PM–2:54 PM,
Monday, April 15, 2019
Sheraton Room: Governor's Square 11
Sponsoring Units: GHP DNP
Chair: Tim Hobbs, Southern Methodist University
Abstract: R09.00004 : Beam Particle Tracking for MUSE*
2:06 PM–2:18 PM
View Presentation Abstract
The Muon Scattering Experiment (MUSE) at Paul Scherrer Institute (PSI) is being prepared to resolve the proton radius puzzle – the six-standard deviation discrepancy between proton charge radius measurements with electronic and muonic probes, respectively. MUSE is designed to measure the proton charge radius with elastic electrons and muons scattering simultaneously and with both charge polarities. For an accurate determination of the lepton scattering angle, event-by-event beam particle tracking is required to reconstruct the incoming particle track. A telescope of Gas Electron Multipliers (GEM), exposed to a high flux of beam particles is used to reconstruct the incoming tracks with high spatial resolution while representing minimal material for the beam to pass through. The status of the GEM performance will be reported in the presentation.
*This work has been supported by NSF awards HRD-1649909 and PHY-1812402.
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