Insight into hadron structure from lattice QCD

Journal Article · Thu May 01 04:00:00 EDT 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.54309· OSTI ID:627679

Negele, J W ^[1]

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1. Center for Theoretical Physics, Laboratory for Nuclear Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts02139 (United States)

A variety of evidence from lattice QCD is presented revealing the dominant role of instantons in the propagation of light quarks in the QCD vacuum and in light hadron structure. The instanton content of lattice gluon configurations is extracted, and observables calculated from the instantons alone are shown to agree well with those calculated using all gluons. The lowest 128 eigenfunctions of the Dirac operator are calculated and shown to exhibit zero modes localized at the instantons. Finally, the zero mode contributions to the quark propagator alone are shown to account for essentially the full strength of the rho and pion resonances in the vector and pseudoscalar correlation functions. {copyright} {ital 1997 American Institute of Physics.}

• Sponsoring Organization: USDOE
• DOE Contract Number: FC02-94ER40818
• OSTI ID: 627679
• Report Number(s): CONF-970564--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 412; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
EIGENFUNCTIONS
GLUONS
HADRONS
INSTANTONS
LATTICE FIELD THEORY
NUCLEON-NUCLEON POTENTIAL
QUANTUM CHROMODYNAMICS