On the $N_f$-dependence of gluonic observables

Abstract

We compute $t_0$, $w_0$ 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 $N_f=0$ results shows the size of sea quark effects in $t_0^2\chi$, with $\chi$ the topological susceptibility, and low energy observables such as $t_0/w_0^2$ and $t_0/r_0^2$.

Corrected comparison of auto-correlations between open and periodic BC; Fixed in-text definition of topological charge, caption of Figure 1 expanded; 7 pages, talk presented at the 31st International Symposium on Lattice Field Theory - Lattice 2013, Mainz, Germany

References in corpus (2)

• High-precision scale setting in lattice QCD
• Scale setting in lattice QCD

Cited by in corpus (7)

• Simulation of QCD with N_f=2+1 flavors of non-perturbatively improved Wilson fermions
• First Physics Results at the Physical Pion Mass from $N_f=2$ Wilson Twisted Mass Fermions at Maximal Twist
• Non-Gaussianities in the topological charge distribution of the SU(3) Yang--Mills theory
• Topological susceptibility and the sampling of field space in $N_f=2$ lattice QCD simulations
• Wilson flow and scale setting from lattice QCD
• Diffusion of topological charge in lattice QCD simulations
• Scale setting in lattice QCD