Lattice calculation of the hadronic leading order contribution to the muon g − 2
Hartmut Wittig, Antoine Gérardin, Marco Cè, Georg M. von Hippel, Ben Hörz, Harvey B. Meyer, Kohtaroh Miura, Daniel Mohler, Konstantin Ottnad, Andreas Risch, Teseo San José, Jonas Wilhelm · EPJ Web of Conferences · 2020
The persistent discrepancy of about 3.5 standard deviations between the experimental measurement and the Standard Model prediction for the muon anomalous magnetic moment, aµ, is one of the most promising hints for the possible existence of new physics. Here we report on our lattice QCD calculation of the hadronic vacuum polarisation contribution $ a_\mu ^{{\rm{hvp}}} $, based on gauge ensembles with Nf = 2 + 1 flavours of O(a) improved Wilson quarks. We address the conceptual and numerical challenges that one encounters along the way to a sub-percent determination of the hadronic vacuum polarisation contribution. The current status of lattice calculations of $ a_\mu ^{{\rm{hvp}}} $ is presented by performing a detailed comparison with the results from other groups.