Calendar of Events
The Proton Radius Puzzle
Speaker: Ron Gilman (Department of Physics & Astronomy, Rutgers University)
Abstract: The proton radius puzzle burst into prominence ten years ago. The significant difference between radius measurements made using electrons and those using muons suggested the possibility of very interesting new physics. I will describe the background to the puzzle including what is a radius and why it is so difficult to measure. Fully resolving the puzzle requires a range of new measurements with atomic systems, with scattering particles, and with determining higher order corrections to extracting a radius. I will review what has been done well and poorly over the past several years, and describe the effort we have led at Rutgers to measure electron and muon scattering and higher-order corrections needed to determine the radius, all at the same time in the same experiment.
Host: Ron Ransome