Further precise determinations of alpha(S) from lattice QCD

被引：79

作者：

Davies, CTH

Hornbostel, K

Lepage, GP

McCallum, P

Shigemitsu, J

Sloan, J

机构：

[1] UKQCD COLLABORAT, GLASGOW G12 8QQ, LANARK, SCOTLAND

[2] SO METHODIST UNIV, DALLAS, TX 75275 USA

[3] CORNELL UNIV, NEWMAN LAB NUCL STUDIES, ITHACA, NY 14853 USA

[4] OHIO STATE UNIV, COLUMBUS, OH 43210 USA

[5] UNIV KENTUCKY, DEPT PHYS & ASTRON, LEXINGTON, KY 40506 USA

来源：

PHYSICAL REVIEW D | 1997年 / 56卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.56.2755

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new determination of the strong coupling constant from lattice QCD simulations. We use four different short-distance quantities to obtain the coupling, three different (infrared) meson splittings to tune the simulation parameters, and a wide range of lattice spacings, quark masses, and lattice volumes to test for systematic errors. Our final result consists of ten different determinations of alpha(P)((3))(8.2 GeV), which agree well with each other and with our previous results. The most accurate of these, when evolved perturbatively to the Z(0) mass, gives alpha (5)/MS(M-Z)=0.1174(24). We compare our results with those obtained from other recent lattice simulations.

引用

页码：2755 / 2765

页数：11

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