Speaker
Lukas Affolter
(ETH Zürich)
Description
Laser spectroscopy of muonic hydrogen (μp) is an ideal platform to probe the proton structure. At the Paul Scherrer Institute, the CREMA collaboration aims to measure the ground-state hyperfine splitting (1S‑HFS) with a relative accuracy of $10^{-6}$ to infer the proton structure contribution (two photon exchange correction) with a relative accuracy of $10^{-4}$. This opens the way for testing the hyperfine splitting in regular hydrogen down to the $10^{-8}–10^{-9}$ level, which could reveal potential BSM effects.
In this talk, I will explain the measurement principle and the present state of our experiment.
Author
Lukas Affolter
(ETH Zürich)
