Speaker
Description
The Muon g-2 Experiment at the Fermi National Accelerator Laboratory has
published in 2023 its measurement of the muon magnetic anomaly, a_mu,
from data collected in 2018-2020, and it is about to release the final
result with the full statistics collected in 2018-2023. The published
result achieved a precision of 220 parts per billion (ppb) and it is
about to be improved by almost a factor of 2 in the final release,
providing a stringent test of the Standard Model. The tension with the
current theoretical full calculation, published in Summer 2020, is now
larger that 5 sigma, however a new approach based on lattice QCD points
to a hadronic contribution to a_mu larger than what previously expected
using e+e- data, and which will move the theoretical prediction closer
to the experimental value.
I will present an overview of the experiment, the technique used to
perform the measurement and how it succeded to reduce the total
uncertainty to a value close to 100ppb. The near term perspectives in
this field of research will also be described.
