The muon g-2 experiment at Fermilab

الأصل · EN

A new measurement of the anomalous magnetic moment of the muon, aμ ≡ (g-2)/2, will be performed at the Fermi National Accelerator Laboratory with data taking beginning in 2017. The most recent measurement, performed at Brookhaven National Laboratory (BNL) and completed in 2001, shows a 3.5 standard deviation discrepancy with the standard model value of aμ. The new measurement will accumulate 21 times the BNL statistics using upgraded magnet, detector, and storage ring systems, enabling a measurement of aμ to 140 ppb, a factor of 4 improvement in the uncertainty the previous measurement. This improvement in precision, combined with recent improvements in our understanding of the QCD contributions to the muon g-2, could provide a discrepancy from the standard model greater than 7σ if the central value is the same as that measured by the BNL experiment, which would be a clear indication of new physics.