10.1103/PhysRevD.90.094503
Bazavov, A.
A.
Bazavov
Bhattacharya, Tanmoy
Tanmoy
Bhattacharya
DeTar, C.
C.
DeTar
Ding, Hengtong
Hengtong
Ding
Gottlieb, Steven
Steven
Gottlieb
Gupta, Rajan
Rajan
Gupta
Hegde, P.
P.
Hegde
Heller, U. M.
U. M.
Heller
Karsch, Frithjof
Frithjof
Karsch
Laermann, Edwin
Edwin
Laermann
Levkova, L.
L.
Levkova
Mukherjee, Swagato
Swagato
Mukherjee
Petreczky, P.
P.
Petreczky
Schmidt, Christian
Christian
Schmidt
Schroeder, C.
C.
Schroeder
Soltz, R. A.
R. A.
Soltz
Söldner, Wolfgang
Wolfgang
Söldner
Sugar, R.
R.
Sugar
Wagner, M.
M.
Wagner
Vranas, P.
P.
Vranas
Equation of state in (2+1)-flavor QCD
American Physical Society (APS)
2014
2015-01-05T10:18:04Z
2018-07-24T13:01:11Z
journal_article
https://pub.uni-bielefeld.de/record/2710546
https://pub.uni-bielefeld.de/record/2710546.json
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 tau = 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 epsilon(c) = (0.18-0.5) GeV/fm(3), i.e., (1.2-3.1) epsilon(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.