1998•Unpublished venueRequires access
Structure of the QCD Vacuum As Seen By Lattice Simulations
T. Degr, Anna Hasenfratz, Tamás G. Kovács
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Abstract
This talk is a review of our studies of instantons and their properties as seen in our lattice simulations of SU(2) gauge theory. We have measured the topological susceptibility and the size distribution of instantons in the QCD vacuum. We have also investigated the properties of quarks moving in instanton background field configurations, where the sizes and locations of the instantons are taken from simulations of the full gauge theory. By themselves, these multi-instanton configurations do not confine quarks, but they induce chiral symmetry breaking. Talk presented by T. DeGrand at the 1997 Yukawa International Seminar What features of the QCD vacuum are responsible for confinement or for the generation of the observed structure of hadron spectroscopy? This question might, in principle, be answered by lattice simulations of non-Abelian gauge theories. We have been studying the properties of instantons from SU(2) lattice