Leading-order hadronic contributions to the electron and tau anomalous magnetic moments

Abstract

The leading hadronic contributions to the anomalous magnetic moments of the electron and the $\tau$-lepton are determined by a four-flavour lattice QCD computation with twisted mass fermions. The continuum limit is taken and systematic uncertainties are quantified. Full agreement with results obtained by phenomenological analyses is found.

Comments: 13 pages, 10 figures, 5 tables; version accepted for publication in EPJC