We describe recent progress on generation of gauge configurations using the Highly Improved Staggered Quark (HISQ) action that was designed by the HPQCD/UKQCD collaboration. The HISQ action requires two levels of smearing with a reunitarization of the links before the second smearing. We describe how we deal with the occurrence of occasional large forces arising from the reunitarization step. The MILC collaboration is currently generating ensembles with approximate lattice spacings of 0.15, 0.12, 0.09, and 0.06 fm, with the strange and charm quark masses close to their physical values and the mass of the light quarks ml set to 0.2ms. We present recent results for pion taste splittings, light hadron masses, the static potential, the c dispersion relation and the topological susceptibility.
|Original language||English (US)|
|Journal||Proceedings of Science|
|State||Published - Jan 1 2009|
|Event||27th International Symposium on Lattice Field Theory, LAT 2009 - Beijing, China|
Duration: Jul 26 2009 → Jul 31 2009
ASJC Scopus subject areas