The QCD Critical Point : marching towards continuum

TL;DR

This paper investigates the QCD critical point by performing lattice simulations with two light quarks, estimating the baryonic susceptibility's convergence radius, and progressing towards the continuum limit.

Contribution

It introduces a Taylor expansion method to estimate the QCD critical point and demonstrates a systematic approach towards the continuum limit using multiple lattice spacings.

Findings

Estimated the radius of convergence of baryonic susceptibility series.

Progressed towards the continuum limit with improved lattice parameters.

Provided insights into the QCD critical point location.

Abstract

We present results of our simulations of QCD with two light dynamical quarks on a 32^3 X 8 lattice at a current quark mass tuned to have the Goldstone pion mass of about 230 MeV. Employing the Taylor expansion method we proposed earlier, we estimate the radius of convergence of the series for the baryonic susceptibility by using terms up to eighth order. Together with our earlier results, corresponding to the same physical parameters but on coarser lattices at respectively 1.33 times and twice the lattice cut-off (a), we were able to attempt a march towards the continuum limit.