The determination of αs from lattice QCD with 2+1 flavors of dynamical quarks

被引：20

作者：

Davies, C ^{[1
]}

Gray, A

Alford, M

Follana, E

Hein, J

Lepage, P

Mason, Q

Nobes, M

Shigemitsu, J

Trottier, H

Wingate, M

机构：

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

[2] Univ Edinburgh, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland

[3] Cornell Univ, Newman Lab Nucl Studies, Ithaca, NY 14853 USA

[4] Dept Phys, Burnaby, BC V5A 1S6, Canada

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

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2003年 / 119卷

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/S0920-5632(03)01631-1

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We describe the first lattice determination of the strong coupling constant with 3 flavors of dynamical quarks. The method follows previous analyses in using a perturbative expansion for the plaquette and Upsilon spectroscopy to set the scale. Using dynamical configurations from the MILC collaboration with 2+1 flavors of dynamical quarks we are able to avoid previous problems of haivng to extrapolate to 3 light flavors from,0 and 2. Our result agrees with our previous work: alpha(s)(MS)(Mz) = 0.121(3).

引用

页码：595 / 597

页数：3