Lattice QCD thermodynamic results with improved staggered fermions

TL;DR

This paper reports on lattice QCD calculations of the equation of state using improved staggered fermions, analyzing lattice cut-off effects and exploring the Taylor expansion method at finite chemical potential.

Contribution

It provides new thermodynamic results with multiple lattice spacings and discusses the Taylor expansion approach for non-zero baryon chemical potential.

Findings

Results obtained on lattices with $N_\tau=4,6,8$

Detailed analysis of lattice cut-off effects

Presentation of isentropic equation of state

Abstract

We present results on the QCD equation of state, obtained with two different improved dynamical staggered fermion actions and almost physical quark masses. Lattice cut-off effect are discussed in detail as results for three different lattice spacings are available now, i.e. results have been obtained on lattices with temporal extent of $N_\tau=4,6$ and 8. Furthermore we discuss the Taylor expansion approach to non-zero baryon chemical potential and present the isentropic equation of state on lines of constant entropy per baryon number.