Speaker
Doug Toussaint
(University of Arizona)
Description
We study the lattice spacing dependence of physical quantities in
simulations with the HISQ quark action, with four flavors of dynamical
quarks. This study uses runs at several lattice spacings, but with
the light quark mass held fixed at two tenths of the strange quark
mass. We find that the lattice
artifacts in the HISQ simulations are much smaller than those in
the asqtad simulations at the same lattice spacings and quark masses.
We also discuss methods for setting the scale, or assigning a lattice
spacing to ensembles run at unphysical parameters.
Finally, we discuss plans for further generation of four-flavor
lattices using the HISQ action.
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Primary author
Doug Toussaint
(University of Arizona)
Co-authors
Alexei Bazavov
(University of Arizona)
Carleton DeTar
(University of Utah)
Claude Bernard
(Washington University)
James Hetirick
(Univerisity of the Pacific)
James Osborn
(Argonne National Laboratory)
John Laiho
(Glasgow University)
Ludmila Levkova
(University of Utah)
Mehmet Oktay
(University of Utah)
Robert Sugar
(University of California at Santa Barbara)
Ruth Van de Water
(Brookhaven National Laboratory)
Steven Gottlieb
(Indiana University)
Urs Heller
(American Physical Society)
Walter Freeman
(University of Arizona)
