Are topological charge fluctuations in QCD instanton dominated? art. no. 014505

被引:35
作者
Edwards, RG
Heller, UM
机构
[1] Jefferson Lab, Newport News, VA 23606 USA
[2] Florida State Univ, CSIT, Tallahassee, FL 32306 USA
关键词
D O I
10.1103/PhysRevD.65.014505
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We consider a recent proposal by Horvath et al. to address the question of whether topological charge fluctuations in QCD are instanton dominated via the response of fermions using lattice fermions with exact chiral symmetry, the overlap fern-Lions. Considering several volumes and lattice spacings, we find strong evidence for chirality of a finite density of low-lying eigenvectors of the overlap-Dirac operator in the regions where these modes are peaked. This result suggests instanton dominance of topological charge fluctuations in quenched QCD.
引用
收藏
页数:7
相关论文
共 29 条
[1]   LATTICE QCD ON SMALL COMPUTERS [J].
ALFORD, M ;
DIMM, W ;
LEPAGE, GP ;
HOCKNEY, G ;
MACKENZIE, PB .
PHYSICS LETTERS B, 1995, 361 (1-4) :87-94
[2]   Exact zero-modes of the compact QED Dirac operator [J].
Berg, BA ;
Heller, UM ;
Markum, H ;
Pullirsch, R ;
Sakuler, W .
PHYSICS LETTERS B, 2001, 514 (1-2) :97-102
[3]  
Bernard C, 2000, NUCL PHYS B-PROC SUP, V83-4, P289
[4]  
BLUM T, IN PRESS PHYS REV D
[5]  
BUNK B, 1994, DESY REPORT
[6]   Low-lying fermion modes, topology, and light hadrons in quenched QCD [J].
DeGrand, T ;
Hasenfrantz, A .
PHYSICAL REVIEW D, 2001, 64 (03)
[7]  
DEGRAND T, 2001, PHYS REV D, V63
[8]  
DEGRAND T, HEPLAT0103002
[9]  
DIAKONOV D, 1995, LECT E FERM SCH PHYS
[10]   Spectral flow, condensate and topology in lattice QCD [J].
Edwards, RG ;
Heller, UM ;
Narayanan, R .
NUCLEAR PHYSICS B, 1998, 535 (1-2) :403-422