Lattice calculation of 1/p2 corrections to αs and of ΛQCD in the (MOM)over-tilde scheme.

被引：82

作者：

Boucaud, P

Burgio, G

Di Renzo, F

Leroy, JP

Micheli, J

Parrinello, C

Pène, O

Pittori, C

Rodríguez-Quintero, J

Roiesnel, C

Sharkey, K

机构：

[1] Univ Paris 11, Phys Theor Lab, CNRS, UMR 8627,Unite Mixte Rech, F-91405 Orsay, France

[2] Univ Parma, Dipartimento Fis, I-43100 Parma, Italy

[3] Ist Nazl Fis Nucl, Grp Collegato Parma, Parma, Italy

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

[5] Univ Roma Tor Vergata, Dipartimento Fis, Rome, Italy

[6] Univ Huelva, EPS La Rabida, Dpto Fis Aplicada & Ingn Elect, Palos de la Fra 21819, Spain

[7] Ecole Polytech, Ctr Phys Theor, CNRS, Unite Mixte Rech,C7644, F-91128 Palaiseau, France

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2000年 / 04期

关键词：

renormalization regularization and renormalons; nonperturbative effects; QCD; lattice QCD;

D O I：

10.1088/1126-6708/2000/04/006

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 report on very strong evidence of the occurrence of power terms in alpha(<(MOM)over tilde>) (p), the QCD running coupling constant in the <(MOM)over tilde> scheme, by analyzing non-perturbative measurements from the lattice three-gluon vertex between 2.0 and 10.0 GeV at zero flavor. While putting forward the caveat that this definition of the coupling is a gauge dependent one, the general relevance of such an occurrence is discussed. We fit Lambda(<(MS)over bar>)((nf=0)) = 237 +/- 3(-10)(+0) MeV in perfect agreement with the result obtained by the ALPHA group with a totally different method. The power correction to alpha(<(MOM)over tilde>) (p) is fitted to (0.63 +/- 0.03(-0.13)(+0.0)) GeV2/p(2).

引用

页数：18

共 42 条

[1] On non perturbative corrections to the potential for heavy quarks [J].