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 $N_{\tau }=6,8,10$, and $12$ and aspect ratio $N_{\sigma }/N_{\tau }=4$. We find that there is a significant contribution to the pressure from charm quarks at temperatures $T>300$ MeV.

8 pages, 3 figures; poster presented at "The 38th International Symposium on Lattice Field Theory", LATTICE2021, 26th-30th July, 2021 Zoom/Gather@Massachusetts Institute of Technology