Hadronic vacuum polarization contribution to the anomalous magnetic moments of leptons from first principles

Abstract

We compute the leading, strong-interaction contribution to the anomalous magnetic moment of the electron, muon and tau using lattice quantum chromodynamics (QCD) simulations. Calculations include the effects of $u$, $d$, $s$ and $c$ quarks and are performed directly at the physical values of the quark masses and in volumes of linear extent larger than $6\mathrm{fm}$. All connected and disconnected Wick contractions are calculated. Continuum limits are carried out using six lattice spacings. We obtain $a_e^{\mathrm{LO}-\mathrm{HVP}}=189.3(2.6)(5.6)\times 10^{-14}$, $a_{\mu }^{\mathrm{LO}-\mathrm{HVP}}=711.1(7.5)(17.4)\times 10^{-10}$ and $a_{\tau }^{\mathrm{LO}-\mathrm{HVP}}=341.0(0.8)(3.2)\times 10^{-8}$, where the first error is statistical and the second is systematic.

17 pages, 8 figures (in 13 PDF files), RevTeX 4.1. Minor changes to results and to text. References updated. Matches version published in Physical Review Letters

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