Quark number susceptibilities and equation of state at finite chemical potential in staggered QCD with Nt=8

Understand

We report the measurement of quark number susceptibilities (QNS) and their temperature dependence from simulations of QCD with two flavours of light dynamical staggered quarks at finite temperature on 8 * 32^3 lattices.

• From the radius of convergence of the Taylor expansion we estimate the critical end point.
• We use a Pade approximant to resum the series expansion and compute the equation of state at finite chemical potential, namely the baryon number density and its contribution to the pressure.
• We also report the isothermal compressibility of QCD matter at finite baryon density.