Speaker
Christian Dreisbach
(Technische Universitaet Muenchen (DE))
Description
The proton radius can be determined by measuring the slope of the electric form factor $G_\text{E}$ at small squared four-momentum transfer $Q^2$. Numerous elastic scattering and laser spectroscopy measurements of the proton radius have been performed with contradicting results ---the so-called proton radius puzzle. We propose to measure the proton radius in high-energy elastic muon-proton scattering at the M2 beam line of CERN's Super Proton Synchrotron in the year 2023. A high-precision measurement at low $Q^2$ realized with a high-pressure hydrogen TPC can contribute to a solution of the puzzle, especially in view of the systematics of this approach compared to electron scattering.
Primary author
Christian Dreisbach
(Technische Universitaet Muenchen (DE))
