Topological susceptibility in lattice QCD with unimproved Wilson fermions

被引：6

作者：

Chowdhury, Abhishek ^{[1
]}

De, Asit K. ^{[1
]}

De Sarkar, Sangita ^{[1
]}

Harindranath, A. ^{[1
]}

Mondal, Santanu ^{[1
]}

Sarkar, Anwesa ^{[1
]}

Maiti, Jyotirmoy ^{[2
]}

机构：

[1] Saha Inst Nucl Phys, Div Theory, Kolkata 700064, W Bengal, India

[2] Barasat Govt Coll, Dept Phys, Kolkata 700124, India

来源：

PHYSICS LETTERS B | 2012年 / 707卷 / 01期

关键词：

Lattice QCD; Wilson fermions; Chiral symmetry; Topological charge; Topological susceptibility; PARTITION-FUNCTION; QUARK MASSES;

D O I：

10.1016/j.physletb.2011.12.034

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We address a long standing problem regarding topology in lattice simulations of QCD with unimproved Wilson fermions. Earlier attempt with unimproved Wilson fermions at beta = 5.6 to verify the suppression of topological susceptibility with decreasing quark mass (m(q)) was unable to unambiguously confirm the suppression. We carry out systematic calculations for two degenerate flavours at two different lattice spacings (beta = 5.6 and 5.8). The effects of quark mass, lattice volume and the lattice spacing on the spanning of different topological sectors are presented. We unambiguously demonstrate the suppression of the topological susceptibility with decreasing quark mass, expected from chiral Ward identity and chiral perturbation theory. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：228 / 232

页数：5

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