Precise measurement of the hyperfine splitting in muonium with a high intensity pulsed muon beam at J-PARC
Year: 2023
Type: conference-paper
Abstract: At J-PARC, the MuSEUM (Muonium Spectroscopy Experiment Using Microwave) collaboration aims to precisely measure the ground-state hyperfine splitting of muonium atoms arising from the muon and electron spins. The pulsed muon beam is stopped in a krypton gas cell to form muonium atoms. The transitions of spin states are induced with a microwave cavity, which are then measured by positron counters. After the previously performed successful measurements with a nearly-zero magnetic field, we are currently planning a measurement with the 2.9T magnetic field by measuring two Zeeman-split sub-levels, so that increased statistics will allow us to more precisely determine the transition frequency down to ∼1ppb. Moreover, a new microwave cavity with a unique geometry is being designed to perform the measurement at an even stronger field of 2.9T in the future.
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: Precise determination of the muon mass by high-precision Rabi-oscillation spectroscopy of the hyperfine structure of muonium atoms, Search for muonium to anti-muonium conversion, Precise measurement of the mass and magnetic moment of muon using electromagnetic traps and the search for new physics, Precision test of electroweak theory and search for new physics beyond the Standard Model by laser spectroscopy of purely leptonic atoms
OpenAlex ID: W4362469331