C. Miao

Equation of state and QCD transition at finite temperature

We calculate the equation of state in

Baryon Number, Strangeness and Electric Charge Fluctuations in QCD at High Temperature

2+1

Equation of State for physical quark masses

flavor QCD at finite temperature with physical strange quark mass and almost physical light quark masses using lattices with temporal extent

Phase boundary for the chiral transition in (2+1) -flavor QCD at small values of the chemical potential

{N}_{\ensuremath{\tau}}=8

Magnetic equation of state in (2 + 1)-flavor QCD

. Calculations have been performed with two different improved staggered fermion actions, the asqtad and p4 actions. Overall, we find good agreement between results obtained with these two

Quark number susceptibilities at high temperatures

O({a}^{2})

Non-zero density QCD by the Taylor expansion method: The Isentropic equation of state, hadronic fluctuations and more

improved staggered fermion discretization schemes. A comparison with earlier calculations on coarser lattices is performed to quantify systematic errors in current studies of the equation of state. We also present results for observables that are sensitive to deconfining and chiral aspects of the QCD transition on

Quarkonium spectral functions with complex potential

{N}_{\ensuremath{\tau}}=6

Meson screening masses from lattice QCD with two light quarks and one strange quark

and 8 lattices. We find that deconfinement and chiral symmetry restoration happen in the same narrow temperature interval. In an appendix we present a simple parametrization of the equation of state that can easily be used in hydrodynamic model calculations. In this parametrization we include an estimate of current uncertainties in the lattice calculations which arise from cutoff and quark mass effects.

Bulk thermodynamics and charge fluctuations at non-vanishing baryon density

We analyze baryon number, strangeness, and electric charge fluctuations as well as their correlations in QCD at high temperature. We present results obtained from lattice calculations performed with an improved staggered fermion action (p4 action) at two values of the lattice cutoff with almost physical up and down quark masses and a physical value for the strange quark mass. We compare these results, with an ideal quark gas at high temperature and a hadron resonance gas model at low temperature. We find that fluctuations and correlations are well described by the former already for temperatures about 1.5 times the transition temperature. At low temperature qualitative features of the lattice results are quite well described by a hadron resonance gas model. Higher order cumulants, which become increasingly sensitive to the light pions, however, show deviations from a resonance gas in the vicinity of the transition temperature.