A lattice calculation of the hadronic vacuum polarization contribution to (g-2)μ

Michele Della Morte, Anthony Francis, A. Gerardin, Vera Gulpers, Herdoiza Gregorio, G. von Hippel, Hanno Horch, Benjamin Jager, Harvey Meyer, A Nyffeler, Hartmut Wittig

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Abstract

We present results of calculations of the hadronic vacuum polarisation contribution to the muon anomalous magnetic moment. Specifically, we focus on controlling the infrared regime of the vacuum polarisation function. Our results are corrected for finite-size effects by combining the Gounaris-Sakurai parameterisation of the timelike pion form factor with the Lüscher formalism. The impact of quark-disconnected diagrams and the precision of the scale determination is discussed and included in our final result in two-flavour QCD, which carries an overall uncertainty of 6%. We present preliminary results computed on ensembles with N f = 2 + 1 dynamical flavours and discuss how the long-distance contribution can be accurately constrained by a dedicated spectrum calculation in the iso-vector channel.

Original languageEnglish
Article number06031
JournalE P J Web of Conferences
Volume175
Number of pages8
ISSN2100-014X
DOIs
Publication statusPublished - 26. Mar 2018
Event35th International Symposium on Lattice Field Theory - Granada, Spain
Duration: 18. Jun 201724. Jun 2017
Conference number: 35

Conference

Conference35th International Symposium on Lattice Field Theory
Number35
CountrySpain
CityGranada
Period18/06/201724/06/2017

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