Theory Seminars

Zoltan Fodor (Penn State, Wuppertal, Budapest, Jülich), "The muon's Magnetic Moment From New Physics Back To The Standard Model"

Name: Zoltan Fodor (Penn State, Wuppertal, Budapest, Jülich), "The muon's Magnetic Moment From New Physics Back To The Standard Model"
Start: 2026-04-30T11:00:00+02:00
End: 2026-04-30T12:00:00+02:00
Location: No location set

Thursday 30 Apr 2026, 11:00 → 12:00 Europe/Amsterdam

Veltman Center

Description

In the last two decades or so there have been stronger and stonger disagreements between direct measurements of the anomalous magnetic moment of the muon and the standard-model prediction. Such a large discrepancy would be a signal for an interaction or particle not present in the standard model. However, already in 2020 a lattice QCD calculation suggested a "no-tension" scenario. I report on our new lattice QCD calculation, which reduced the uncertainty of our 2020 result by about 40%. The agreement between the measured value of the anomalous magnetic moment of the muon and its theoretical predictions is an extremely impressive prove of the validity of quantum field theory --with three very different calculational frameworks for QED, EW and QCD-- up to 11 digits.