Determination of αs from the QCD static energy: An update

被引：71

作者：

Bazavov, Alexei ^{[1
]}

Brambilla, Nora ^{[2
,3
]}

Garcia i Tormo, Xavier ^{[4
]}

Petreczky, Peter ^{[1
]}

Soto, Joan ^{[5
,6
]}

Vairo, Antonio ^{[2
]}

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[2] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

[3] Tech Univ Munich, Inst Adv Study, D-85748 Garching, Germany

[4] Univ Bern, Inst Theoret Phys, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland

[5] Univ Barcelona, Dept Estruct & Constituents Mat, E-08028 Barcelona, Catalonia, Spain

[6] Univ Barcelona, Inst Ciencies Cosmos, E-08028 Barcelona, Catalonia, Spain

来源：

PHYSICAL REVIEW D | 2014年 / 90卷 / 07期

基金：

瑞士国家科学基金会;

关键词：

LATTICE GAUGE-THEORY; HEAVY-QUARKONIUM; LOOPS; LIMIT;

D O I：

10.1103/PhysRevD.90.074038

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an update of our determination of the strong coupling alpha(s) from the quantum chromodynamics static energy. This updated analysis includes new lattice data, at smaller lattice spacings and reaching shorter distances, the use of better suited perturbative expressions to compare with data in a wider distance range, and a comprehensive and detailed estimate of the error sources that contribute to the uncertainty of the final result. Our updated value for alpha(s) at the Z-mass scale, M-Z, is alpha(s)(M-Z) = 0.1166(-0.0008)(+0.0012), which supersedes our previous result.

引用

页数：20

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