Update on (2+1+1)-flavor QCD equation of state
Abstract
We report on preliminary results from the calculations of the QCD equation of state for 2+1+1 flavors using HISQ action. The calculations are performed on lattices with temporal extents Nτ=6,~8,~10, and 12 and aspect ratio Nσ/Nτ=4. We find that there is a significant contribution to the pressure from charm quarks at temperatures T> 300 MeV.
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