High-precision charm-quark mass and QCD coupling from current-current correlators in lattice and continuum QCD

被引：132

作者：

Allison, I. ^{[1
]}

Dalgic, E. ^{[2
]}

Davies, C. T. H. ^{[3
]}

Follana, E. ^{[4
]}

Horgan, R. R. ^{[5
]}

Hornbostel, K. ^{[6
]}

Lepage, G. P. ^{[7
]}

McNeile, C. ^{[3
]}

Shigemitsu, J. ^{[4
]}

Trottier, H. ^{[2
]}

Woloshyn, R. M. ^{[1
]}

Chetyrkin, K. G. ^{[8
]}

Kuehn, J. H. ^{[8
]}

Steinhauser, M. ^{[8
]}

Sturm, C. ^{[9
]}

机构：

[1] TRIUMF, Vancouver, BC V6T 2A3, Canada

[2] Simon Fraser Univ, Dept Phys, Vancouver, BC, Canada

[3] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[4] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[5] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, England

[6] So Methodist Univ, Dallas, TX 75275 USA

[7] Cornell Univ, Lab Elementary Particle Phys, Ithaca, NY 14853 USA

[8] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany

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

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 05期

基金：

英国科学技术设施理事会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.78.054513

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use lattice QCD simulations, with MILC gluon configurations and HISQ c-quark propagators, to make very precise determinations of moments of charm-quark pseudoscalar, vector and axial-vector correlators. These moments are combined with new four-loop results from continuum perturbation theory to obtain several new determinations of the MS mass of the charm quark and of the MS coupling. We find m(c)(3 GeV) = 0.986(10) GeV, or, equivalently, m(c)(mc) = 1.268(9) GeV, both for n(f) = 4 flavors; and alpha((MS) over bar)(3 GeV, n(f) = 4) = 0.251(6), or, equivalently, alpha((MS) over bar)(M-Z,M- n(f) = 5) = 0.1174(12). The new mass agrees well with results from continuum analyses of the vector correlator using experimental data for e(+) e(-) annihilation ( instead of using lattice QCD simulations). These lattice and continuum results are the most accurate determinations to date of this mass. Ours is also one of the most accurate determinations of the QCD coupling by any method.

引用

页数：12

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