Chiral symmetry breaking, instantons and the ultimate quenched calculation
classification
✦ hep-lat
keywords
breakingchiraldensityevidenceinstantonsquenchedspectralsymmetry
read the original abstract
We calculate the spectral density of the Dirac operator over an ensemble of configurations composed of overlapping instantons and anti-instantons. We find evidence that the spectral density diverges in the limit of small eigenvalues. This indicates the breaking of chiral symmetry and also provides evidence that quenched QCD may be pathological in nature.
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