Status of the detector setup for the FAMU experiment at RIKEN-RAL for a precision measurement of the Zemach radius of the proton in muonic hydrogen

Abstract

The FAMU experiment at RIKEN-RAL is a muonic atom experiment with the aim to determine the Zemach radius of the proton by measuring the 1s hyperfine splitting in muonic hydrogen. The activity of the FAMU Collaboration in the years 2015-2023 enabled the final optimisation of the detector-target setup as well as the gas working condition in terms of temperature, pressure and gas mixture composition. The experiment has started its data taking in July 2023. The status of the detector setup for the 2023 experimental runs, for the beam characterisation and muonic X-ray detection in the 100-200 keV energy range, is presented and discussed.

Submitted to JINST

References in corpus (5)

• The Proton Radius Puzzle
• Radiative nonrecoil nuclear finite size corrections of order $\alpha (Z\alpha {)}^5$ to the hyperfine splitting of S-states in muonic hydrogen
• Large area LaBr3:Ce crystals read by SiPM arrays with improved timing and temperature gain drift control
• Improving the Time Resolution of Large-Area LaBr3:Ce Detectors with SiPM Array Readout
• Characterisation of a low-momentum high-rate muon beam monitor for the FAMU experiment at the CNAO-XPR beam facility

Cited by in corpus (2)

• The muon beam monitor for the FAMU experiment: design, simulation, test and operation
• The fast X-ray detector system of the FAMU experiment at RAL