Insight into Hadron Structure from Lattice QCD

Details Insight into Hadron Structure from Lattice QCD Insight into Hadron Structure from Lattice QCD

1997-09-26

arxiv.org/abs/hep-lat/9709129v2

Physics

High Energy Physics

High Energy Physics - Lattice

Email to negele@mitlns.mit.edu; 15 pages, 5 eps figures; Correction: LaTeX, BoxedEPS macros; Paper to appear in Proceedings of

Scientific paper

10.1063/1.54309

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.

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