Hadronic Vacuum Polarization Contribution To G 2 Of The Leptons And M 1tnz Alpha M Z

Here we report the first lattice QCD calculation of the hadronic vacuum polarization (HVP) disconnected contribution to the muon anomalous magnetic moment at physical pion mass. The calculation uses a refined noise-reduction technique that enables the control of statistical uncertainties at the desired level with modest computational effort. Measurements were performed on the 483×96 physical-pion-mass lattice generated by the RBC and UKQCD Collaborations. In conclusion, we find the leading-order hadronic vacuum polarization a$HVP(LO)disc\atop{[mu]}$=-9.6(3.3)(2.3)×10-10, where the first error is statistical and the second systematic.