Non-perturbative determination of the axial current normalization constant in O(a) improved lattice QCD

被引：218
作者：
Luscher, M
Sint, S
Sommer, R
Wittig, H
机构：
[1] FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA
[2] CERN, DIV THEORY, CH-1211 GENEVA 23, SWITZERLAND
[3] DESY IFH ZEUTHEN, D-15738 ZEUTHEN, GERMANY
[4] UNIV OXFORD, OXFORD OX1 3NP, ENGLAND
来源：
NUCLEAR PHYSICS B | 1997年 / 491卷 / 1-2期
关键词：
elementary particle physics; quantum chromodynamics (QCD); lattice gauge theory; chiral symmetry; Symanzik improvement; numerical simulations; partially conserved axial vector current;
D O I：
10.1016/S0550-3213(97)00087-4
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：
A finite-size technique is employed to compute the normalization constant Za of the isovector axial current in lattice QCD. The calculation is carried out in the quenched approximation for values of the ban gauge coupling go ranging from 0 to 1. In the lattice action and the lattice expression for the axial current we include the counterterms required for O(a) improvement, with non-perturbatively determined coefficients. With little additional work the normalization constant Z(v) of the improved isospin current is also obtained. (C) 1997 Elsevier Science B.V.
引用
收藏
页码：344 / 361
页数：18
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