Speaker
Description
The muon anomalous magnetic moment, aμ = (gμ − 2)/2, and electric dipole moment (EDM) are powerful probes of physics beyond the Standard Model (SM). The final result from the Fermilab Muon g−2 experiment has established a new benchmark for precision tests of the SM. While the latest lattice-QCD-based prediction agrees with the experimental value, discrepancies between different theoretical approaches remain unresolved. An independent measurement is therefore important for further testing the muon anomalous magnetic moment.
The J-PARC muon g−2/EDM experiment aims to measure aμ and search for the muon EDM using a novel approach distinct from those employed by the BNL E821 and Fermilab E989 experiments. The experiment utilizes a low-emittance muon beam produced through thermal muonium formation and laser ionization. The muons are subsequently reaccelerated and injected into a compact storage magnet using a three-dimensional spiral injection scheme.
Following the first demonstration of muon cooling and acceleration, we have recently succeeded in accelerating cooled muons to 0.3 MeV in the dedicated experimental area at J-PARC. In this talk, we will present the experimental concept, recent progress in the development of key components, and future prospects toward precision measurements of the muon g−2 and EDM.