The Hadronic Vacuum Polarisation Contribution to the Muon g-2 from Lattice QCD

by Prof. Hartmut Wittig (Johannes Gutenberg-Universität Mainz)

Thursday 28 Jul 2022, 16:00 → 17:30 Asia/Seoul

1424 in building 1 (KIAS)

Title : The Hadronic Vacuum Polarisation Contribution to the Muon g-2 from Lattice QCD

Speaker : Hartmut Wittig (Johannes Gutenberg-Universität Mainz)

 

Abstract : Following the publication of the first results from the E989 experiment at Fermilab, the discrepancy between the measured value of the anomalous magnetic moment and the Standard Model prediction has increased to 4.2 standard deviations. The uncertainty of the theoretical prediction is dominated by the hadronic vacuum polarisation contribution, which is traditionally evaluated using dispersion integrals and experimental hadronic cross section data. However, recent lattice QCD calculations have provided hints for a reduced tension with the experimental measurement. In this talk I review the status of lattice calculations for the hadronic vacuum polarisation contribution with a particular focus on a class of benchmark quantities, the so-called window observables, which can be determined reliably with high precision, both in lattice QCD and the data-driven approach. The implications for precision tests of the Standard Model are discussed.

arXiv:2206.06582

GMT20220728-070145_Recording_1832x982.mp4

KIAS2022.pdf