Lattice QCD ensembles with four flavors of highly improved staggered quarks

By A. Bazavov, C. Bernard, J. Komijani, C. DeTar, L. Levkova, W. Freeman, S. Gottlieb, R. Zhou, U. Heller, J. Hetrick and 5 more. 2012

248 citations recorded by the source corpus.

We present results from our simulations of quantum chromodynamics with four flavors of quarks: u, d, s, and c. These simulations are performed with a one-loop Symanzik improved gauge action and the highly improved staggered quark action. We are generating gauge configurations with four values of the lattice spacing ranging from 0.06 to 0.15 fm, and three values of the light quark mass, including the value for which the Goldstone pion mass is equal to the physical pion mass. We discuss simulation algorithms, scale setting, taste symmetry breaking, and the autocorrelations of various quantities. We also present results for the topological susceptibility that demonstrate the improvement of the highly improved staggered quark configurations relative to those generated earlier with the asqtad improved staggered action.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/8d0b272b24de0449fe25df9d832bf7efef8ab208

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Citations in the corpus

A Guide to Light-Cone PDFs from Lattice QCD: An Overview of Approaches, Techniques, and Results (2018, methodology): “After plotting M(ν, z 2 3) vs. the Ioffe time, the Authors noticed a significant z-dependence of the results and applied the one-loop LLA evolution for all points with z ≤ 4a, i.e. 1/z ≥ 500 MeV.”
Flavor structure of the nucleon sea from lattice QCD (2014, methodology): “We use Nf = 2 + 1 + 1 HISQ lattice gauge ensembles (generated by MILC Collaboration) and clover valence fermions with pion mass 310 MeV.”
Parton distributions and lattice-QCD calculations: Toward 3D structure (2020, methodology): “The quasi-PDF matrix elements are extracted from correlators computed on the a ≈ 0.12 fm, 243 × 64 ensemble with 2 + 1 + 1 flavors of highly improved staggered quarks (Follana et al., 2007) and Mπ ≈ 310 MeV was generated by the MILC collaboration (Bazavov et al., 2013).”
Review of lattice results concerning low-energy particle physics (2016, methodology): “[14] are obtained using the HISQ ensembles with up, down, strange and charm dynamical quarks, generated by the MILC collaboration [333] (see also Ref.”
Simulation of QCD with Nf = 2 + 1 flavors of non-perturbatively improved Wilson fermions (2014, methodology): “Also domain wall fermions are employed by RBC-UKQCD [18] and overlap fermions by JLQCD [19] as well as smeared rooted staggered fermions by MILC [20].”