Equation of state in (2+1) flavor QCD at hightemperatures

By A. Bazavov, Tanmoy Bhattacharya, C. DeTar, H. Ding, S. Gottlieb, Rajan Gupta, P. Hegde, U. Heller, F. Karsch, E. Laermann and 10 more. Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018), 2009

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We present results for the equation of state in ( 2 + 1 )-flavor QCD using the highly improved staggered quark action and lattices with temporal extent N τ = 6 , 8, 10, and 12. We show that these data can be reliably extrapolated to the continuum limit and obtain a number of thermodynamic quantities and the speed of sound in the temperature range 130–400 MeV. We compare our results with previous calculations and provide an analytic parameterization of the pressure, from which other thermodynamic quantities can be calculated, for use in phenomenology. We show that the energy density in the crossover region, 145 MeV ≤ T ≤ 163 MeV , defined by the chiral transition, is e c = ( 0.18 – 0.5 ) GeV / fm 3 , i.e., ( 1.2 – 3.1 ) e nuclear . At high temperatures, we compare our results with resummed and dimensionally reduced perturbation theory calculations. As a byproduct of our analyses, we obtain the values of the scale parameters r 0 from the static quark potential and w 0 from the gradient flow.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/11798734994c2eba41416bed5ccf63aa69aeba41

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In Nuclear and High Energy Physics

Citations in the corpus

Multiplicity dependence of light-flavor hadron production in pp collisions at √s = 7 TeV (2019, neutral): “The chemical freeze-out temperature Tch is varied from 146 to 166 MeV as in [6] following recent results from Lattice QCD calculations and their uncertainties [68] as well as by fits to experimental data from central Pb-Pb collisions [11, 69].”
Heavy quarkonium in extreme conditions (2019, methodology): “Using the HISQ action to implementNf = 2+1 light quarks flavors with almost physical pion mass m = 160MeV on Ns = 48 and N = 12 (see [52]), as well as N = 16 grids (see [177]), a large number of configurations (Nconf = 4 − 9 × 103) has been generated.”
QCD at finite temperature and chemical potential from Dyson–Schwinger equations (2018, result): “12 and compared to results of lattice QCD [6, 429], again with qualitative and partly quantitative agreement.”