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Type: Conference paper
Title: The influence of instantons on the quark propagator
Author: Trewartha, D.
Kamleh, W.
Leinweber, D.
Moran, P.
Citation: PoS (Lattice 2012); 247
Publisher: Proceedings of Science
Publisher Place: Italy
Issue Date: 2012
ISSN: 1824-8039
Conference Name: International Symposium on Lattice Field Theory (30th : 2012 : Cairns, Australia)
Statement of
Daniel Trewartha, Waseem Kamleh, Derek Leinweber, Peter Moran
Abstract: We use over-improved stout-link smearing to investigate the presence and nature of instantons on the lattice. We find that smearing can remove short-range effects with little damage to the longrange structure of the gauge field, and that after around 50 sweeps this process is complete. There are more significant risks for very high levels of smearing beyond 100 sweeps. We are thus able to produce gauge configurations dominated by instanton effects. We then calculate the overlap quark propagator on these configurations, and thus the non-perturbative mass function. We find that smeared configurations preserve the majority of dynamical mass generation, and conclude that instantons are primarily responsible for the dynamical generation of mass.
Description: Extent: 6p.
Rights: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence
DOI: 10.22323/1.164.0247
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Special Research Centre for the Subatomic Structure of Matter publications

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