Muon g − 2: BMW calculation of the hadronic vacuum polarization contribution

B. C. Toth, Sz Borsanyi, Z. Fodor, J. N. Guenther, C. Hoelbling, S. D. Katz, L. Lellouch, T. Lippert, K. Miura, L. Parato, K. K. Szabo, F. Stokes, Cs Torok, L. Varnhorst

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

We compute the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon. The calculations are performed using four flavors of stout smeared staggered quarks, with quark masses at their physical values. The continuum limit is taken using six different lattice spacings ranging from 0.132 fm down to 0.064 fm. All strong isospin breaking and electromagnetic effects are accounted for to leading order. A controlled infinite volume limit is taken thanks to dedicated simulations performed in box sizes up to 11 fm. Putting all these ingredients together, we find [(gμ − 2)/2]LO−HVP = 707.5[5.5] × 10−10, which has a total uncertainty of 0.8%. Compared to determinations based on the e+e− → hadrons cross section, our result significantly reduces the tension between the standard model prediction for the muon g − 2 and its experimental value.

Original languageEnglish (US)
Article number005
JournalProceedings of Science
Volume396
StatePublished - Jul 8 2022
Event38th International Symposium on Lattice Field Theory, LATTICE 2021 - Virtual, Online, United States
Duration: Jul 26 2021Jul 30 2021

All Science Journal Classification (ASJC) codes

  • General

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