The hadronic vacuum polarization contribution to the muon g − 2 from lattice QCD
Della Morte, Michele
Herdoíza G., Gregorio
Von Hippel, Georg
Meyer, Harvey B.
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
We present a calculation of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment, aμhvp, in lattice QCD employing dynamical up and down quarks. We focus on controlling the infrared regime of the vacuum polarization function. To this end we employ several complementary approaches, including Padé fits, time moments and the time-momentum representation. We correct our results for finite-volume effects by combining the Gounaris-Sakurai parameterization of the timelike pion form factor with the Lüscher formalism. On a subset of our ensembles we have derived an upper bound on the magnitude of quark-disconnected diagrams and found that they decrease the estimate for aμhvp by at most 2%. Our final result is ahvpμ=(654±32+21−23)·10−10, where the first error is statistical, and the second denotes the combined systematic uncertainty. Based on our findings we discuss the prospects for determining aμhvp with sub-percent precision Show more
Journal / seriesJournal of High Energy Physics
Pages / Article No.
SubjectLattice QCD; Nonperturbative effects; Precision QED
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