PION DECAY CONSTANT IN FULL LATTICE QCD

被引：8
作者：
FUKUGITA, M
ISHIZUKA, N
MINO, H
OKAWA, M
UKAWA, A
机构：
[1] NATL LAB HIGH ENERGY PHYS KEK,IBARAKI 305,JAPAN
[2] YAMANASHI UNIV,FAC ENGN,KOFU 540,JAPAN
[3] UNIV TSUKUBA,INST PHYS,TSUKUBA,IBARAKI 305,JAPAN
来源：
PHYSICS LETTERS B | 1993年 / 301卷 / 2-3期
关键词：
D O I：
10.1016/0370-2693(93)90693-C
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The pion decay constant is calculated for full QCD on the lattice employing a variety of methods derived from current algebra and PCAC relations. The calculation is made at beta = 5.7 on a 20(4) lattice with two flavors of Kogut-Susskind quarks. Most of the calculation is made in the Landau gauge, for which various methods give results in a very good agreement, yielding f(pi) = 97 +/- 9 (statistical) +/- 4 (systematic) MeV. In particular the results obtained with the gauge non-invariant axial-vector current perfectly agrees with those of the gauge invariant current, if corrected by the Z factor using the mean-field improvement of the gauge coupling constant and operators. Dependence of the results on the type of gauge fixing is also examined using the Coulomb gauge.
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页码：224 / 230
页数：7
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