An international team, including researchers from the University of Liverpool, has announced the most precise measurement of the muon's magnetic anomaly, refining our understanding of the Standard Model of particle physics.
The Muon g-2 experiment, conducted at Fermilab, released its third and final measurement based on data collected from 2021 to 2023. The new result aligns with previous findings but achieves an unprecedented precision of 127 parts-per-billion, surpassing the initial experimental design goal.
The experiment studies the wobble of muons, subatomic particles similar to electrons but much heavier, within a magnetic field. This precision sets a stringent benchmark for proposed extensions to the Standard Model. The University of Liverpool played a crucial role in the experiment, designing and building tracking detectors. Further theoretical refinement is necessary to improve the Standard Model prediction and better constrain New Physics.