The muon g-2 puzzles
Date : May 7, 2025 16:00 ~
Speaker : Massimo Passera (Embassy of Italy, Seoul)
Professor : Prof. Sunghoon Jung, Prof. Joonho Jang, Prof. Yongjoo Baek
Location : 56동105호
The muon magnetic moment anomaly, or muon “g-2”, provides one of the most sensitive tests of the Standard Model (SM) of particle physics. Indeed, any deviation between the theoretical SM prediction and the measured value could be interpreted as a signal of as yet undiscovered new physics. The results of the Muon g-2 experiment at Fermilab confirmed Brookhaven's earlier measurements and increased the discrepancy with the SM prediction based on dispersive determinations of its leading hadronic contribution, thus strengthening a new physics interpretation. On the other hand, lattice QCD results support a no-new-physics scenario. In this talk I will review the current status of the SM prediction of the muon g-2, focusing on the latest developments of this puzzle, particularly in light of the upcoming measurement expected in the near future. I will also present the MUonE proposal for an experiment at CERN where fixed-target muon-electron scattering data will provide a new direct determination of the leading hadronic contribution to the muon g-2. This new approach could play a crucial role in resolving the muon g-2 puzzle.