"The anomalous magnetic moment of the muon"
The difference between experiment and Standard-Model theory for the anomalous magnetic moment of the muon is, at 4.2 standard deviations, an important hint for new physics. The Fermilab E989 experiment, which recently released their first measurement result, and the planned J-PARC E34 experiment aim to reduce the experimental uncertainties by a factor of four. To leverage this anticipated improvement in experimental precision, and determine unambiguously whether or not new-physics effects contribute to this quantity, the theoretical errors must be made more reliable and reduced to a commensurate level. The Muon g-2 Theory Initiative was formed in 2017 to provide platforms that facilitate interactions between the different groups to consolidate the Standard-Model prediction and map out strategies for reducing the theory errors to keep pace with experiment. I will review the current status of Standard Model theory for this quantity and map out the future prospects.
This is the first in a series of talks surrounding the theory efforts addressing the muon anomalous magnetic moment, with the other talks following over the next few weeks.