Determination of quark masses from nf=4 lattice QCD and the RI- SMOM intermediate scheme

被引：33

作者：

Lytle, A. T. ^{[1
]}

Davies, C. T. H. ^{[1
]}

Hatton, D. ^{[1
]}

Lepage, G. P. ^{[2
]}

Sturm, C. ^{[3
]}

机构：

[1] Univ Glasgow, Sch Phys & Astron, ISUPA, Glasgow G12 8QQ, Lanark, Scotland

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

[3] Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Hilb Weg 22, D-97074 Wurzburg, Germany

来源：

PHYSICAL REVIEW D | 2018年 / 98卷 / 01期

基金：

英国科学技术设施理事会; 美国国家科学基金会;

关键词：

NONPERTURBATIVE RENORMALIZATION; ANOMALOUS DIMENSION; BETA-FUNCTION; (MS)OVER-BAR; INVARIANT; OPERATORS;

D O I：

10.1103/PhysRevD.98.014513

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We determine the charm and strange quark masses in the (MS) over bar scheme, using n(f) = 2 +1 + 1 lattice QCD calculations with highly improved staggered quarks and the regularization-independent symmetric momentum-subtraction intermediate scheme to connect the bare lattice quark masses to continuum renormalization schemes. Our study covers the analysis of systematic uncertainties from this method, including nonperturbative artifacts and the impact of the nonzero physical sea quark masses. We find m(c)((MS) over bar) (3 GeV) = 0.9896(61) GeV and m(s)((MS) over bar) (3 GeV) = 0.08536(85) GeV, where the uncertainties are dominated by the tuning of the bare lattice quark masses. These results are consistent with, and of similar accuracy to, those using the current-current correlator approach coupled to high-order continuum QCD perturbation theory, implemented in the same quark formalism and on the same gauge field configurations. This provides a strong test of the consistency of methods for determining the quark masses to high precision from lattice QCD. We also give updated lattice QCD world averages for c and s quark masses.

引用

页数：23

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