Window observable for the hadronic vacuum polarization contribution to the muon g-2 from lattice QCD

被引：109

作者：

Ce, M. ^{[1
,2
,3
]}

Gerardin, A. ^{[4
]}

von Hippel, G. ^{[5
,6
]}

Hudspith, R. J. ^{[7
]}

Kuberski, S. ^{[7
,8
]}

Meyer, H. B. ^{[5
,6
,7
]}

Miura, K. ^{[7
,9
]}

Mohler, D. ^{[8
,10
]}

Ottnad, K. ^{[5
,6
]}

Paul, S. ^{[5
,6
]}

Risch, A. ^{[11
]}

San Jose, T. ^{[5
,6
,7
]}

Wittig, H. ^{[3
,5
,6
,7
]}

机构：

[1] Univ Bern, Albert Einstein Ctr Fundamental Phys AEC, Sidlerstr 5, CH-3012 Bern, Switzerland

[2] Univ Bern, Inst Theoret Phys, Sidlerstr 5, CH-3012 Bern, Switzerland

[3] CERN, Dept Theoret Phys, CH-1211 Geneva 23, Switzerland

[4] Univ Toulon & Var, Aix Marseille Univ, CNRS, CPT, F-13288 Marseille, France

[5] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence, D-55128 Mainz, Germany

[6] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55128 Mainz, Germany

[7] Johannes Gutenberg Univ Mainz, Helmholtz Inst Mainz, D-55128 Mainz, Germany

[8] GSI Helmholtz Ctr Heavy Ion Res, D-64291 Darmstadt, Germany

[9] High Energy Accelerator Res Org, KEK Theory Ctr, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan

[10] Tech Univ Darmstadt, Inst Kernphys, Schlossgartenstr 2, D-64289 Darmstadt, Germany

[11] Deutsch Elektronen Synchrotron DESY, John von Neumann Inst Comp NIC, Platanenallee 6, D-15738 Zeuthen, Germany

来源：

PHYSICAL REVIEW D | 2022年 / 106卷 / 11期

关键词：

ANOMALOUS MAGNETIC-MOMENT; PION FORM-FACTOR; VECTOR CURRENT; FINITE-VOLUME; IMPROVEMENT; SCATTERING;

D O I：

10.1103/PhysRevD.106.114502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Euclidean time windows in the integral representation of the hadronic vacuum polarization contribution to the muon g - 2 serve to test the consistency of lattice calculations and may help in tracing the origins of a potential tension between lattice and data-driven evaluations. In this paper, we present results for the intermediate time window observable computed using O(a) improvedWilson fermions at six values of the lattice spacings below 0.1 fm and pion masses down to the physical value. Using two different sets of improvement coefficients in the definitions of the local and conserved vector currents, we perform a detailed scaling study which results in a fully controlled extrapolation to the continuum limit without any additional treatment of the data, except for the inclusion of finite-volume corrections. To determine the latter, we use a combination of the method of Hansen and Patella and the Meyer-Lellouch-Luscher procedure employing the Gounaris-Sakurai parametrization for the pion form factor. We correct our results for isospin-breaking effects via the perturbative expansion of QCD thorn QED around the isosymmetric theory. Our result at the physical point is a(mu)(win) = (237.30 +/- 0.79(stat) +/- 1.22(syst)) x 10(-10), where the systematic error includes an estimate of the uncertainty due to the quenched charm quark in our calculation. Our result displays a tension of 3.9 sigma with a recent evaluation of a(mu)(win) based on the data-driven method.

引用

页数：33

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