The QCD chiral condensate from the lattice

被引：68

作者：

Giusti, L

Rapuano, F

Talevi, M

Vladikas, A

机构：

[1] Scuola Normale Super Pisa, I-56100 Pisa, Italy

[2] Ist Nazl Fis Nucl, Sez Pisa, I-56100 Pisa, Italy

[3] Univ Roma La Sapienza, Dipartimento Fis, Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

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

[5] Univ Roma Tor Vergata, Dipartimento Fis, Ist Nazl Fis Nucl, Sez Roma 2, I-00133 Rome, Italy

来源：

NUCLEAR PHYSICS B | 1999年 / 538卷 / 1-2期

关键词：

D O I：

10.1016/S0550-3213(98)00659-2

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 determine the chiral condensate from simulations of quenched lattice QCD with Wilson fermions. Our measurements have been obtained with high statistics at three values of the gauge coupling, corresponding to UV cutoffs in the range 2-4 GeV. Several improvements have been made with respect to earlier lattice computations. The most important are the non-perturbative renormalization of the condensate, the use of the tree-level improved Clover action and the reduction of the systematic error due to uncertainties in the lattice calibration. Our result for the chiral condensate in the <(MS)over bar> scheme is (<(psi)over bar>psi)(<(MS)over bar>) (mu = 2 GeV) = -0.0147(8)(16)(12) GeV3 = -[245(4)(9)(7) MeV](3), where the first error is statistical, the second is due to the nonperturbative renormalization and the third due to the lattice calibration. (C) 1999 Elsevier Science B.V.

引用

页码：249 / 277

页数：29

共 71 条

[1] Light quenched hadron spectrum and decay constants on different lattices [J].