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Instanton effects in hadron spectroscopy in SU(2) (lattice) gauge theory

1997/10/22 by Thomas DeGrand, Anna Hasenfratz, Tamás G. Kovács +1
Physics and Astronomy · #Field (mathematics) #Gauge (firearms) #Gauge boson #Gauge theory #Hadron spectroscopy #High-Energy Particle Collisions Research #Instanton #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quark #Spectroscopy #Symmetry (geometry) #hep-lat #hep-ph #hep-th

paper · pdf · doi:10.1016/s0370-2693(97)01497-4

published as Phys.Lett. B420 (1998) 97-103 · 13 pages, LaTeX, 8 eps figures

arxiv created 1997/10/22 · openalex publication_date 1998/02/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We describe quenched spectroscopy in SU(2) gauge theory using smoothed gauge field configurations. We investigate 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.

Citations