A STUDY OF IMPROVEMENT IN LATTICE QCD

被引：60

作者：

MARTINELLI, G

SACHRAJDA, CT

VLADIKAS, A

机构：

[1] NATL INST NUCL PHYS, ROME, ITALY

[2] UNIV CALIF SANTA BARBARA, INST THEORET PHYS, SANTA BARBARA, CA 93106 USA

[3] UNIV ROMA TOR VERGATTA 2, DIPARTIMENTO FIS, I-00173 ROME, ITALY

来源：

NUCLEAR PHYSICS B | 1991年 / 358卷 / 01期

关键词：

MESON DECAY CONSTANTS; CONTINUUM-LIMIT; FERMION ACTION; CURRENTS;

D O I：

10.1016/0550-3213(91)90538-9

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 perform a numerical simulation in quenched lattice QCD using an improved action for the quarks. With this action, the systematic errors in hadronic matrix elements due to the finiteness of the lattice spacing are reduced from terms of O(a) to ones of O(g0(2)a), where a and g0 are the lattice spacing and bare coupling constant, respectively. We demonstrate explicitly that for matrix elements of the vector current this corresponds to a reduction of these errors from about 20-30% to about 5%. We therefore propose that future simulations in lattice QCD be performed using an improved fermion action.

引用

页码：212 / 227

页数：16

共 28 条

[1]

Abada A., 1990, Nuclear Physics B, Proceedings Supplements, V17, P518, DOI 10.1016/0920-5632(90)90305-E

[2] COMPUTATION OF THE RELATION BETWEEN THE QUARK MASSES IN LATTICE GAUGE-THEORIES AND ON THE CONTINUUM [J].