A PRECISE DETERMINATION OF ALPHA(S) FROM LATTICE QCD

被引：83

作者：

DAVIES, CTH

HORNBOSTEL, K

LEPAGE, GP

LIDSEY, A

SHIGEMITSU, J

SLOAN, J

机构：

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

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

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

[4] FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA

来源：

PHYSICS LETTERS B | 1995年 / 345卷 / 01期

基金：

美国国家科学基金会;

关键词：

STRONG COUPLING CONSTANT; LATTICE QCD; QUARKONIUM (BEAUTY); PERTURBATION THEORY;

D O I：

10.1016/0370-2693(94)01598-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new determination of the QCD strong coupling constant based on precise lattice calculations of the gamma spectrum. The largest systematic uncertainty in previous such determinations resulted from the absence of vacuum polarization from light quarks. We substantially reduce this error by including two flavors of dynamical light quarks and extrapolating to three. We find alpha(v)((3)) (8.2 GeV) approximate to alpha(p)((3)) (8.2 GeV) = 0.196(3) for three light flavors, corresponding to alpha(5)/MS(M(z)) = 0.115(2). This is significantly more accurate than previous determinations using this or any other technique.

引用

页码：42 / 48

页数：7

共 25 条

[21] QCD MATCHING CONDITIONS AT THRESHOLDS [J].