Determination of Λ(MS)over-bar from quenched and Nf=2 dynamical QCD

被引：57

作者：

Booth, S ^{[1
]}

Göckeler, M

Horsley, R

Irving, AC

Joo, B

Pickles, S

Pleiter, D

Rakow, PEL

Schierholz, G

Sroczynski, Z

Stüben, H

机构：

[1] Univ Edinburgh, EPCC, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[3] DESY, John Von Neumann Inst Comp NIC, D-15735 Zeuthen, Germany

[4] Univ Liverpool, Dept Math Sci, Div Theoret Phys, Liverpool L69 3BX, Merseyside, England

[5] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[6] DESY, D-22603 Hamburg, Germany

[7] Konrad Zuse Zentrum Informat Tech Berlin, D-14195 Berlin, Germany

来源：

PHYSICS LETTERS B | 2001年 / 519卷 / 3-4期

关键词：

QCD; lattice; strong coupling constant; Lambda parameter;

D O I：

10.1016/S0370-2693(01)01103-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The scale parameter Lambda ((MS) over bar) is computed on the lattice in the quenched approximation and for N-f = 2 flavors of light dynamical quarks. The dynamical calculation is done with non-perturbatively O(a) improved Wilson-fern-dons. In the continuum limit we obtain Lambda (Nf=0)((MS) over bar) = 243(1)(10) MeV and Lambda (Nf =2)((MS) over bar) = 217(16)(11) MeV, respectively. (C) 2001 Published by Elsevier Science B.V.

引用

页码：229 / 237

页数：9

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