Robert D. Mawhinney

Equation of state and QCD transition at finite temperature

We calculate the equation of state in

The transition temperature in QCD

2+1

Physical results from 2+1 flavor domain wall QCD and SU(2) chiral perturbation theory

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

Review of lattice results concerning low-energy particle physics: Flavour Lattice Averaging Group (FLAG)

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

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

. 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

Equation of State for physical quark masses

O({a}^{2})

Continuum limit physics from 2+1 flavor domain wall QCD

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

QCD Phase Transition with Chiral Quarks and Physical Quark Masses

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

Domain wall QCD with physical quark masses

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.

Quenched lattice QCD with domain wall fermions and the chiral limit

We present a detailed calculation of the transition temperature in QCD with two light and one heavier (strange) quark mass on lattices with temporal extent N_t =4 and 6. Calculations with improved staggered fermions have been performed for various light to strange quark mass ratios in the range, 0.05 0) and continuum (aT = 1/N_t -> 0) limits we find for the transition temperature at the physical point T_c r_0 = 0.457(7) where the scale is set by the Sommer-scale parameter r_0 defined as the distance in the static quark potential at which the slope takes on the value, (dV_qq(r)/dr)_r=r_0 = 1.65/r_0^2. Using the currently best known value for r_0 this translates to a transition temperature T_c = 192(7)(4)MeV. The transition temperature in the chiral limit is about 3% smaller. We discuss current ambiguities in the determination of T_c in physical units and also comment on the universal scaling behavior of thermodynamic quantities in the chiral limit.