First results on the running coupling in QCD with two massless flavours

被引：62

作者：

Bode, A ^{[1
]}

Frezzotti, R

Gehrmann, B

Hasenbusch, M

Heitger, J

Jansen, K

Kurth, S

Rolf, J

Simma, H

Sint, S

Sommer, R

Weisz, P

Wittig, H

Wolff, U

机构：

[1] CSIT, Tallahassee, FL USA

[2] Univ Milano Bicocca, Dipartimento Fis, Milan, Italy

[3] CERN, TH, Geneva, Switzerland

[4] Humboldt Univ, Inst Phys, Berlin, Germany

[5] Univ Munster, Inst Theoret Phys, D-4400 Munster, Germany

[6] NIC, Zeuthen, Germany

[7] DESY, Zeuthen, Germany

[8] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

[9] Max Planck Inst Phys, D-80805 Munich, Germany

[10] Univ Liverpool, Dept Math Sci, Liverpool L69 3BX, Merseyside, England

来源：

PHYSICS LETTERS B | 2001年 / 515卷 / 1-2期

关键词：

lattice QCD; dynamical fermions; running coupling; renormalization;

D O I：

10.1016/S0370-2693(01)00857-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the non-perturbative computation of the running coupling of two-flavour QCD in the Schrodinger functional scheme. The corresponding A-parameter, which describes the coupling strength at high energy, is related to a low energy scale which still remains to be connected to a hadronic "experimentally" observable quantity. We find the non-perturbative evolution of the coupling important to eliminate a significant contribution to the total error in the estimated A-parameter. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：49 / 56

页数：8

共 24 条

[1] Two loop computation of the Schrodinger functional in lattice QCD (vol 576, pg 517, 2000) [J].