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[en] We compute t0, w0 and the topological susceptibility, defined at finite gradient flow time for two-flavour QCD. The use of three lattice spacings and pion masses between 192 and 500 MeV together with a careful error analysis allow to approach the continuum limit of the two-flavour theory despite significant auto-correlations. A comparison to Nf=0 results shows the size of sea quark effects in t20χ, with χ the topological susceptibility, and low energy observables such as t0/w20 and t0/r20.
Source
Dec 2013; 7 p; Lattice 2013: 31. International symposium on lattice field theory; Mainz (Germany); 29 Jul - 3 Aug 2013; ISSN 0418-9833; 