BMW/DMZ calculation of the hadronic vacuum polarisation for the muon magnetic moment

TL;DR

This paper reports precise lattice QCD calculations of the hadronic vacuum polarization contribution to the muon magnetic moment, challenging previous theoretical consensus and impacting the interpretation of experimental discrepancies.

Contribution

It presents the latest results from BMW and DMZ collaborations, achieving a 0.45% precision in the hadronic vacuum polarization calculation, which questions prior theoretical estimates.

Findings

Lattice calculations eliminate previous tension between theory and experiment.

Achieved a 0.45% precision in the hadronic vacuum polarization estimate.

Results suggest potential need to revise the understanding of muon g-2 discrepancies.

Abstract

For twenty years, a persistent discrepancy between experimental measurements and theoretical calculations of the muon anomalous magnetic moment have provided tantalising hints of new physics. In recent years, improvements to the experimental precision have appeared to make the tension stronger and stronger. However, at the same time, our lattice calculation overturned the theoretical consensus, completely eliminating the tension. I will present the latest results from the Budapest-Marseille-Wuppertal (BMW) and DMZ collaborations, with a hybrid determination of the hadronic vacuum polarisation contribution to a precision of 0.45%