Speaker
Clara PESET
(Universidad Complutense de Madrid, Spain)
Description
Effective field theories (EFTs) are exceptionally suited to define and determine the proton radius and its relatives from low energy observables. They not only provide a unified and unambiguous definition of the low energy constants that naturally includes electromagnetic corrections, but they also yield a robust determination of the theoretical uncertainty. In this talk, I will present the effective field theory that allows us to extract the proton charge radius from spectroscopic measurements. As an application, I will review the determination of the proton radius from measurements of the Lamb shift in regular and muonic hydrogen, emphasizing the importance of the EFT framework.
