Strong-isospin-breaking correction to the muon anomalous magnetic moment from lattice QCD at the physical point

Chakraborty, B. et al. (2018) Strong-isospin-breaking correction to the muon anomalous magnetic moment from lattice QCD at the physical point. Physical Review Letters, 120(15), 152001. (doi:10.1103/PhysRevLett.120.152001)

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Abstract

All lattice-QCD calculations of the hadronic-vacuum-polarization contribution to the muon’s anomalous magnetic moment to date have been performed with degenerate up- and down-quark masses. Here we calculate directly the strong-isospin-breaking correction to aHVP μ for the first time with physical values of mu and md and dynamical u, d, s, and c quarks, thereby removing this important source of systematic uncertainty. We obtain a relative shift to be applied to lattice-QCD results obtained with degenerate light-quark masses of δaHVP;mu≠md μ ¼ þ1.5ð7Þ%, in agreement with estimates from phenomenology

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hatton, Mr Daniel and Davies, Professor Christine and Koponen, Dr Jonna and DeTar, Professor Carleton
Authors: Chakraborty, B., Davies, C.T.H., DeTar, C., El-Khadra, A.X., Gámiz, E., Gottlieb, S., Hatton, D., Koponen, J., Kronfeld, A.S., Laiho, J., Lepage, G.P., Liu, Y., Mackenzie, P.B., McNeile, C., Neil, E.T., Simone, J.N., Sugar, R., Toussaint, D., Van de Water, R.S., and Vaquero, A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114
Published Online:12 April 2018
Copyright Holders:Copyright © 2018 The American Physical Society
First Published:First published in Physical Review Letters 120(15):152001
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
729781Phenomenology from Lattice QCD and Collider PhysicsChristine DaviesScience & Technology Facilities Council (STFC)ST/P000746/1S&E P&A - PHYSICS & ASTRONOMY
630801Phenomenology from Lattice QCD and collider physicsChristine DaviesScience & Technology Facilities Council (STFC)ST/L000466/1S&E P&A - PHYSICS & ASTRONOMY