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

被引：42

作者：

Göckeler, M ^{[1
]}

Horsley, R

Kürzinger, W

Pleiter, D

Rakow, PEL

Schierholz, G

机构：

[1] Univ Leipzig, Inst Theoret Phys, D-04109 Leipzig, Germany

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[3] Univ Edinburgh, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland

[4] Deutsch Elektron Synchrotron DESY, John von Neumann Inst Comp NIC, D-15735 Zeuthen, Germany

[5] Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany

[6] Univ Liverpool, Dept Math Sci, Div Theoret Phys, Liverpool L69 3BX, Merseyside, England

[7] Deutsch Elektron Synchrotron DESY, D-22603 Hamburg, Germany

来源：

NUCLEAR PHYSICS B | 2004年 / 688卷 / 1-2期

关键词：

QCD; Lattice; e(+)e(-) annihilation; muon anomalous magnetic moment;

D O I：

10.1016/j.nuclphysb.2004.03.026

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We compute the vacuum polarization 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. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：135 / 164

页数：30

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