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Vacuum polarisation and hadronic contribution to muon g-2 from lattice QCD

Göckeler, M.; Horsley, R.; Kürzinger, W.; Pleiter, D.; Rakow, P.E.L. and Schierholz, G. (2004) Vacuum polarisation and hadronic contribution to muon g-2 from lattice QCD. Nuclear Physics B, 688 (1-2). pp. 135-164. ISSN 0550-3213

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Official URL: http://www.elsevier.com/wps/find/journaldescriptio...

Abstract

We compute the vacuum polarisation on the lattice in quenched QCD using non-perturbatively improved Wilson fermions. Above Q^2 of about 2 GeV^2 the results are very close to the predictions of perturbative QCD. Below this scale we see signs of non-perturbative effects which we can describe by the use of dispersion relations. We use our results to estimate the light quark contribution to the muon's anomalous magnetic moment. We find the result 446(23) x 10^{-10}, where the error only includes statistical uncertainties. Finally we make some comments on the applicability of the Operator Product Expansion to our data.

Item Type:Article
Additional Information:LTH 615. arXiv Number: arXiv:hep-lat/0312032v1. Available online 15 April 2004. Issue: 7 June 2004.
Uncontrolled Keywords:QCD; Lattice; e(+)e(-) annihilation; muon anomalous magnetic moment; FERMION LATTICE FIELD THEORY; GAUGE FIELD THEORY SU(3); MUON MAGNETIC MOMENT; VACUUM POLARIZATION; APPROXIMATION QUENCHING; EFFECT FINITE SIZE; DISPERSION RELATIONS; PERTURBATION THEORY; OPERATOR PRODUCT EXPANSION; NUMERICAL CALCULATIONS MONTE CARLO
Subjects:Q Science > QC Physics
Departments, Research Centres and Related Units:Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences
DOI:10.1016/j.nuclphysb.2004.03.026
Related URLs:
Refereed:No
Status:Published
ID Code:491
Deposited On:19 Aug 2008 10:27
Last Modified:20 May 2011 13:21

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