Lattice2010

Session

Parallel 03: Nonzero temperature and density

14 Jun 2010, 14:30

Villasimius, Sardinia

301. The finite temperature QCD transition

Zoltan Fodor (University of Wuppertal)

14/06/2010, 14:30

Nonzero temperature and density

We extend our previous two studies on the finite temperature cross-over of QCD. We chose even finer lattices ($N_t$=16) and work with physical quark masses. The new results are in complete agreement with our earlier ones. We compare our findings with the published results of the hotQCD collaboration (obtained with the asqtad and p4 actions with $N_t = 8$). All these results are confronted...

245. The QCD equation of state with dynamical quarks

Szabolcs Borsanyi (University of Wuppertal)

14/06/2010, 14:50

Nonzero temperature and density

We determine the equation of state of QCD from lattice simulations. Lattices with Nt = 6 and 8 are used, and the continuum limit is approached by checking the results at Nt = 10 and 12. A Symanzik improved gauge and a stout-link improved staggered fermionic action is utilized; the light and strange quark masses are set to their physical values.

124. On the universal O(N) scaling behavior of (2+1)-flavor QCD

Christian Schmidt (Frankfurt Institute for Advanced Studies)

14/06/2010, 15:10

Nonzero temperature and density

We analyze the universal scaling behavior of (2+1)-flavor QCD in terms of various scaling functions corresponding to the magnetic equation of state, the specific heat and generalized quark number susceptibilities. Lattice simulations on Nt=4 and Nt=8 lattices with improved staggered fermions within a wide range of quark masses have been performed and are fitted to the scaling functions....

180. Chiral Aspects of Improved Staggered Fermions with 2+1-Flavors from the hotQCD Collaboration

Wolfgang Soeldner (GSI Darmstadt)

14/06/2010, 15:30

Nonzero temperature and density

We present recent results from HotQCD simulations of 2+1 flavors of improved staggered fermions at zero baryon number density near the high temperature crossover. Included are new results from simulations of asqtad fermions at Nt = 12 and a nearly physical Goldstone pion mass and from simulations of HISQ fermions at Nt = 8. We focus on observables sensitive to chiral symmetry and...

324. Taste symmetry and QCD thermodynamics with improved staggered fermions

Alexei Bazavov (University of Arizona)

14/06/2010, 15:50

Nonzero temperature and density

Taste symmetry violations in staggered fermion formulations correlate strongly with the cut-off (lattice spacing) dependence in physical observables. Better taste symmetry on the lattice can be achieved either by decreasing the lattice spacing and going to larger temporal extent in finite-temperature calculations, or by further improving the action. The Highly Improved Staggered Quark (HISQ)...