Phase structure of four flavor QCD in the T \mu plane from a new method for simulations of lattice gauge theories at non zero baryon density

TL;DR

This paper introduces a new numerical method for simulating four-flavor QCD at non-zero baryon density, successfully mapping its phase structure and identifying a first-order transition line up to 1.4 times the critical temperature.

Contribution

The paper presents a novel simulation method for lattice gauge theories at finite baryon density and applies it to explore the phase diagram of four-flavor QCD.

Findings

Identified a first-order transition line in the phase diagram.

Explored chemical potential region up to 1.4 T_C.

Validated the method with a solvable model.

Abstract

We review a method for numerical simulations of lattice gauge theories at non-zero baryonic chemical potential we recently proposed. We first report on a test of the method using a solvable model and then present results for the phase structure of four flavour QCD. For the first time the region of chemical potential up to 1.4 T_C is explored, finding a first order transition line.