The QCD equation of state at finite T/\mu on the lattice

TL;DR

This paper reports lattice QCD calculations of the equation of state at finite temperature and chemical potential, using reweighting techniques to explore regions relevant for heavy-ion collisions.

Contribution

It introduces a method to extend the QCD equation of state to finite chemical potential using multi-parameter reweighting on the lattice.

Findings

Equation of state results up to 500-600 MeV in temperature and chemical potential.

Extension of lattice QCD methods to non-zero chemical potential.

Results along the line of constant physics.

Abstract

We present N_t=4 lattice results for the equation of state of 2+1 flavour staggered, dynamical QCD at finite temperature and chemical potential. We use the overlap improving multi-parameter reweighting technique to extend the equation of state for non-vanishing chemical potentials. The results are obtained along the line of constant physics. Our physical parameters extend in temperature and baryon chemical potential upto \approx 500-600 MeV.