THE IMPROVEMENT OF HADRONIC MATRIX-ELEMENTS IN LATTICE QCD

被引：185
作者：
HEATLIE, G
SACHRAJDA, CT
MARTINELLI, G
PITTORI, C
ROSSI, GC
机构：
[1] UNIV ROME LA SAPIENZA,DIPARTMENTO FIS,I-00185 ROME,ITALY
[2] UNIV LAQUILA,DIPARTMENTO FIS,I-67100 LAQUILA,ITALY
[3] IST NAZL FIS NUCL,LAB NAZL GRAN SASSO,LAQUILA,ITALY
来源：
NUCLEAR PHYSICS B | 1991年 / 352卷 / 01期
关键词：
D O I：
10.1016/0550-3213(91)90137-M
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 present a practical method to eliminate all terms of order a (a being the lattice spacing) in the calculations of hadronic matrix elements with Wilson fermions. The method is based on an "improved" Wilson action combined with a suitable modification of the fermion operators. With this technique one expects to reduce significantly the systematic errors which arise due to the finiteness of the lattice spacing. We estimate that these errors will be reduced from about 20-30% (as found in recent numerical simulations) to just a few percent.
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页码：266 / 288
页数：23
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