Are Topological Charge Fluctuations in QCD Instanton Dominated?

Journal Article · Tue May 01 00:00:00 EDT 2001 · submitted to Phys Rev

OSTI ID:780797

Edwards, Robert G; Heller, Urs M

We consider a recent proposal by Horvath et al. to address the question whether topological charge fluctuations in QCD are instanton dominated via the response of fermions using lattice fermions with exact chiral symmetry, the overlap fermions. 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.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 780797
• Report Number(s): JLAB-THY-01-13; DOE/ER/40150-1841; hep-lat/0105004; FSU-CSIT-01-24; TRN: US0102634
• Journal Information: submitted to Phys Rev, Vol. D; Other Information: Submitted to Phys. Rev., Volume D; PBD: 1 May 2001
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHIRAL SYMMETRY
CHIRALITY
EIGENVECTORS
FERMIONS
FLUCTUATIONS
INSTANTONS
QUANTUM CHROMODYNAMICS
DIRAC OPERATORS