Speaker
Description
Muonic hydrogen ($\mu p$) consists of a negatively charged muon bound to a proton. The large mass of the muon makes the energy levels of this atomic system sensitive to the finite size effects of the proton. The CREMA collaboration aims to measure the 1S hyperfine splitting in muonic hydrogen to $1\,$ppm relative uncertainity. This measurement can be used to determine the proton structure contribution to about $100\,$ppm and also be compared with the measurement of the same transition in hydrogen.
The experiment is designed to be carried out at PSI, Switzerland. It features a cryogenic hydrogen target, high-energy mid-infrared laser system, multipass-toroidal enhancement cell and a novel detection scheme. I will give an overview of the experimental scheme and report on its current status.