Puzzles in the hadronic contributions to the muon anomalous magnetic moment

2023/08/08 by Colangelo, Gilberto, Hoferichter, Martin, Stoffer, Peter · 1 citation
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2308.04217

Abstract

We summarize recent developments in the Standard-Model evaluation of the anomalous magnetic moment of the muon a_μ, both in the hadronic-light-by-light and hadronic-vacuum-polarization contributions. The current situation for the latter is puzzling as we are confronted with multiple discrepancies that are not yet understood. We present updated fits of a dispersive representation of the pion vector form factor to the new CMD-3 data set and quantify the tensions with the other high-statistics e⁺e^-→π⁺π^- experiments in the contribution to a_μ in the energy range up to 1 GeV, as well as in the corresponding contribution to the intermediate Euclidean window.

Cited by

• Field-theoretic versus data-driven evaluations of electromagnetic corrections to hadronic vacuum polarization in (g-2)_μ

Related

• The anomalous magnetic moment of the muon in the Standard Model
• High precision calculation of the hadronic vacuum polarisation contribution to the muon anomaly
• Status of the Hadronic Contribution to the Muon (g-2) Value
• Hadronic contributions to the muon anomalous moment
• The Muon Anomalous Magnetic Moment: Standard Model Theory and Beyond