Simulation of QCD with N_f=2+1 flavors of non-perturbatively improved Wilson fermions

Abstract

We describe a new set of gauge configurations generated within the CLS effort. These ensembles have N_f=2+1 flavors of non-perturbatively improved Wilson fermions in the sea with the Luescher-Weisz action used for the gluons. Open boundary conditions in time are used to address the problem of topological freezing at small lattice spacings and twisted-mass reweighting for improved stability of the simulations. We give the bare parameters at which the ensembles have been generated and how these parameters have been chosen. Details of the algorithmic setup and its performance are presented as well as measurements of the pion and kaon masses alongside the scale parameter t_0.

29 pages, 7 figures, version accepted for publication by JHEP

References in corpus (16)

• Ab initio calculation of the neutron-proton mass difference
• Perturbative analysis of the gradient flow in non-abelian gauge theories
• High-precision scale setting in lattice QCD
• Infinite N phase transitions in continuum Wilson loop operators
• Critical slowing down and error analysis in lattice QCD simulations
• Accelerating Dynamical Fermion Computations using the Rational Hybrid Monte Carlo (RHMC) Algorithm with Multiple Pseudofermion Fields
• Light hadrons from lattice QCD with light (u,d), strange and charm dynamical quarks
• First results from 2+1 dynamical quark flavors on an anisotropic lattice: light-hadron spectroscopy and setting the strange-quark mass
• Local coherence and deflation of the low quark modes in lattice QCD
• Deflation acceleration of lattice QCD simulations
• Reweighting towards the chiral limit
• Two-flavor QCD simulation with exact chiral symmetry
• Topological susceptibility and the sampling of field space in $N_f=2$ lattice QCD simulations
• On the effects of heavy sea quarks at low energies
• Non-renormalizability of the HMC algorithm
• Status and challenges of simulations with dynamical fermions

Cited by in corpus (10)

• The strong coupling from a nonperturbative determination of the $\Lambda$ parameter in three-flavor QCD
• Slow running of the Gradient Flow coupling from 200 MeV to 4 GeV in $N_{\mathrm{f}}=3$ QCD
• Fighting topological freezing in the two-dimensional CP${}^{N-1}$ model
• Second moment of the pion distribution amplitude with the momentum smearing technique
• Non-perturbative determination of improvement coefficients using coordinate space correlators in $N_f=2+1$ lattice QCD
• Power corrections from decoupling of the charm quark
• Nucleon form factors and couplings with $N_{\mathrm{f}}=2+1$ Wilson fermions
• pMR: A high-performance communication library
• Tuning of the strange quark mass with optimal reweighting
• Determination of c_sw in N_f=3+1 Lattice QCD with massive Wilson fermions