Instanton contributions to the low-lying hadronic mass spectrum
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(Published version)
Date
2012
Authors
Thomas, S.
Kamleh, W.
Leinweber, D.
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Conference paper
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PoS (Lattice 2012); 256
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Samuel Thomas, Waseem Kamleh, and Derek Leinweber
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International Symposium on Lattice Field Theory (30th : 2012 : Cairns, Australia)
Abstract
The masses of the light hadrons are calculated on in lattice QCD at various stages of stout-link smearing tuned specifically to preserve instanton-like objects. The calculation is performed using a 20³ × 40 dynamical FLIC ensemble with lattice spacing 0.126 fm at a range of pion masses; the effect of vacuum instanton content is compared at a common pion mass of 350 MeV. We find little evidence that the instanton effect is as significant as models would suggest. In fact, the direct instanton-induced effect cannot be seen at all.
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