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Title: Two-flavor QCD correction to lepton magnetic moments at leading-order in the electromagnetic coupling

Abstract

We present a reliable nonperturbative calculation of the QCD correction, at leading-order in the electromagnetic coupling, to the anomalous magnetic moment of the electron, muon and tau leptons using two-flavor lattice QCD. We use multiple lattice spacings, multiple volumes and a broad range of quark masses to control the continuum, infinite-volume and chiral limits. We examine the impact of the commonly ignored disconnected diagrams and introduce a modification to the previously used method that results in a well-controlled lattice calculation. We obtain 1.513 (43) 10^-12, 5.72 (16) 10^-8 and 2.650 (54) 10^-6 for the leading-order QCD correction to the anomalous magnetic moment of the electron, muon and tau respectively, each accurate to better than 3%.

Authors:
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1024484
Report Number(s):
JLAB-THY-11-1333; DOE/OR/23177-1539; arXiv:1103.4818
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1104752
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 08; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; LEPTONS; MAGNETIC MOMENTS; MODIFICATIONS; MUONS; QUANTUM CHROMODYNAMICS; QUARKS; TAU PARTICLES

Citation Formats

Dru Renner, Xu Feng, Karl Jansen, Marcus Petschlies. Two-flavor QCD correction to lepton magnetic moments at leading-order in the electromagnetic coupling. United States: N. p., 2011. Web. doi:10.1103/PhysRevLett.107.081802.
Dru Renner, Xu Feng, Karl Jansen, Marcus Petschlies. Two-flavor QCD correction to lepton magnetic moments at leading-order in the electromagnetic coupling. United States. https://doi.org/10.1103/PhysRevLett.107.081802
Dru Renner, Xu Feng, Karl Jansen, Marcus Petschlies. 2011. "Two-flavor QCD correction to lepton magnetic moments at leading-order in the electromagnetic coupling". United States. https://doi.org/10.1103/PhysRevLett.107.081802. https://www.osti.gov/servlets/purl/1024484.
@article{osti_1024484,
title = {Two-flavor QCD correction to lepton magnetic moments at leading-order in the electromagnetic coupling},
author = {Dru Renner, Xu Feng, Karl Jansen, Marcus Petschlies},
abstractNote = {We present a reliable nonperturbative calculation of the QCD correction, at leading-order in the electromagnetic coupling, to the anomalous magnetic moment of the electron, muon and tau leptons using two-flavor lattice QCD. We use multiple lattice spacings, multiple volumes and a broad range of quark masses to control the continuum, infinite-volume and chiral limits. We examine the impact of the commonly ignored disconnected diagrams and introduce a modification to the previously used method that results in a well-controlled lattice calculation. We obtain 1.513 (43) 10^-12, 5.72 (16) 10^-8 and 2.650 (54) 10^-6 for the leading-order QCD correction to the anomalous magnetic moment of the electron, muon and tau respectively, each accurate to better than 3%.},
doi = {10.1103/PhysRevLett.107.081802},
url = {https://www.osti.gov/biblio/1024484}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 08,
volume = 107,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 2011},
month = {Mon Aug 01 00:00:00 EDT 2011}
}