The Influence of Instantons on the Quark Propagator

Autor:	Trewartha, Amalie, Kamleh, Waseem, Leinweber, Derek, Moran, Peter
Rok vydání:	2012
Předmět:	High Energy Physics - Lattice
Druh dokumentu:	Working Paper
Popis:	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 long-range 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 reproduce the majority of dynamical mass generation, and conclude that instantons are primarily responsible for the dynamical generation of mass. Comment: The 30th International Symposium on Lattice Field Theory June 24 -- 29, 2012 Cairns, Australia
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1212.0275 Zobrazit plný text záznamu View this record from Arxiv