Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

The muon g-2 anomaly confronts new physics in $e^\pm$ and $μ^\pm$ final states scattering

Jul 8, 2022, 12:06 PM
Room 9 (Indaco)

Room 9 (Indaco)

Parallel Talk Quark and Lepton Flavour Physics Quark and Lepton Flavour Physics


Luc Jean Marie Darmé


The discrepancy between the standard model prediction for the muon anomalous magnetic moment and the experimental result is accompanied by other anomalies. A crucial input for the prediction is the hadronic vacuum polarization inferred from hadronic data. However, the two most accurate determinations from KLOE and BaBar disagree by almost 3 sigma. Additionally, the combined data-driven result also disagrees with the most precise lattice determination. We show that all these discrepancies could be accounted for by a new boson produced resonantly around the KLOE centre of mass energy and decaying promptly yielding lepton pairs in the final states. We then present a simple model that can reconcile the KLOE and BaBar results, the data-driven and the lattice SM predictions, and eventually the predicted and measured values of the muon anomalous magnetic moment, while complying with all phenomenological constraints.

In-person participation Yes

Primary authors

Luc Jean Marie Darmé Enrico Nardi (Istituto Nazionale di Fisica Nucleare) Giovanni Grilli Di Cortona (Istituto Nazionale di Fisica Nucleare)

Presentation materials