The QCD equation of state with 2+1 flavors of Highly Improved Staggered Quarks (HISQ)

TL;DR

This paper reports on lattice QCD calculations of the quark-gluon plasma's equation of state using the HISQ discretization scheme for 2+1 flavors, providing insights into non-perturbative QCD properties relevant for heavy-ion collision modeling.

Contribution

The study presents new lattice QCD results for the 2+1 flavor equation of state using HISQ discretization on multiple lattice sizes, advancing non-perturbative QCD understanding.

Findings

Equation of state results for N_tau=6,8,10,12

Comparison with other fermion actions

Progress in non-perturbative QCD calculations

Abstract

One of the fundamental properties of the quark-gluon plasma (QGP), the equation of state, is a subject of extensive studies in lattice QCD and an essential requirement for the correct hydrodynamic modeling of heavy-ion collisions. Lattice QCD provides first-principle calculations for the physics in the non-perturbative regime. In this contribution, we report on recent progress by the HotQCD collaboration in studying the 2+1 flavor equation of state on lattices with the temporal extent N_tau=6, 8, 10 and 12 in Highly Improved Staggered Quarks (HISQ) discretization scheme. Comparisons with equation of state calculations with different fermion actions are also discussed.