Higher-order hadronic-vacuum-polarization contribution to the muon g-2 from lattice QCD

Chakraborty, B., Davies, C.T.H. , Koponen, J., Lepage, G.P. and Van de Water, R.S. (2018) Higher-order hadronic-vacuum-polarization contribution to the muon g-2 from lattice QCD. Physical Review D, 98, 094503. (doi: 10.1103/PhysRevD.98.094503)

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We introduce a new method for calculating the O ( α 3 ) hadronic-vacuum-polarization contribution to the muon anomalous magnetic moment from ab initio lattice QCD. We first derive expressions suitable for computing the higher-order contributions either from the renormalized vacuum polarization function ^ Π ( q 2 ) or directly from the lattice vector-current correlator in Euclidean space. We then demonstrate the approach using previously published results for the Taylor coefficients of ^ Π ( q 2 ) that were obtained on four-flavor QCD gauge-field configurations with physical light-quark masses. We obtain 10 10 a HVP , HO μ = − 9.3 ( 1.3 ) in agreement with, but with a larger uncertainty than, determinations from e + e − → hadrons data plus dispersion relations.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Koponen, Dr Jonna and Davies, Professor Christine
Authors: Chakraborty, B., Davies, C.T.H., Koponen, J., Lepage, G.P., and Van de Water, R.S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN (Online):2470-0029
Copyright Holders:Copyright © 2018 American Physical Society
First Published:First published in Physical Review D 98:094503
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
729782Phenomenology from Lattice QCD and Collider PhysicsChristine DaviesScience & Technology Facilities Council (STFC)ST/P000746/1S&E P&A - PHYSICS & ASTRONOMY