The hadronic vacuum polarization contribution to aµ from full lattice QCD

Chakraborty, B., Davies, C. T. H. , de Oliveira, P.G., Koponen, J. and Lepage, G.P. (2017) The hadronic vacuum polarization contribution to aµ from full lattice QCD. Physical Review D, 96(3), 034516. (doi: 10.1103/PhysRevD.96.034516)

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Abstract

We determine the contribution to the anomalous magnetic moment of the muon from the α2 QED hadronic vacuum polarization diagram using full lattice QCD and including u=d quarks with physical masses for the first time. We use gluon field configurations that include u, d, s and c quarks in the sea at multiple values of the lattice spacing, multiple u=d masses and multiple volumes that allow us to include an analysis of finite-volume effects. We obtain a result for aHVP;LO μ of 667ð6Þð12Þ × 10−10, where the first error is from the lattice calculation and the second includes systematic errors from missing QED and isospin-breaking effects and from quark-line disconnected diagrams. Our result implies a discrepancy between the experimental determination of aμ and the Standard Model of 3σ.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Davies, Professor Christine and Koponen, Dr Jonna
Authors: Chakraborty, B., Davies, C. T. H., de Oliveira, P.G., Koponen, J., and Lepage, G.P.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:1550-7998
ISSN (Online):1550-2368
Published Online:22 August 2017
Copyright Holders:Copyright © 2017 American Physical Society
First Published:First published in Physical Review D 96(3):034516
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
630801Phenomenology from Lattice QCD and collider physicsChristine DaviesScience & Technology Facilities Council (STFC)ST/L000466/1S&E P&A - PHYSICS & ASTRONOMY