Simple check of the vacuum structure in full QCD lattice simulations

Details Simple check of the vacuum structure in full QCD lattice simulations Simple check of the vacuum structure in full QCD lattice simulations

2001-08-13

arxiv.org/abs/hep-lat/0108015v1

AIP Conf.Proc. 602 (2001) 40-47

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages, 4 figures including in total 8 graphs, 2 tables; presented at QCD@Work: International Conference on QCD: Theory and E

Scientific paper

10.1063/1.1435910

Given the increasing availability of lattice data for (unquenched) QCD with $N_f=2$, it is worth while to check whether the generated vacuum significantly deviates from the quenched one. I discuss a specific attempt to do this on the basis of topological susceptibility data gained at various sea-quark masses, since for this observable detailed predictions are available. The upshot is that either discretization effects in dynamical simulations are still untolerably large or the vacuum structure in 2-flavour QCD substantially deviates from that in the theory with 3 (or 2+1) light quarks.

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