PoS - Proceedings of Science
Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Detector R&D and Data Handling
The FAMU experiment at RIKEN RAL for a precise measure of the proton radius
M. Bonesini
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Abstract
The goal of the FAMU experiment at RIKEN RAL is to measure the hyperfine splitting of the ground state of the muonic hydrogen, to allow a determination of the proton Zemach radius with a precision better than $5×10^{-3}$. The comparison of this measurement with the ones done with ordinary hydrogen may help to solve the so-called “proton radius puzzle” , triggered by the 6σ discrepancy in the proton charge radius value as extracted from muonic Lamb shift and the value based on e-p scattering and ordinary hydrogen spectroscopy.
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