The phase diagram of a gauge theory with fermionic baryons

TL;DR

This paper presents the first lattice simulation results of G2 QCD with dynamical fermions, exploring its phase diagram at finite temperature and baryon chemical potential, to gain insights into dense, strongly-interacting matter.

Contribution

It provides the first lattice simulation study of G2 QCD with dynamical fermions, offering new insights into its phase diagram at finite temperature and chemical potential.

Findings

First lattice results for G2 QCD with dynamical fermions

Exploration of the phase diagram at finite temperature and baryon chemical potential

Insights into dense, strongly-interacting matter from a sign-problem-free theory

Abstract

The fermion-sign problem at finite density is a persisting challenge for Monte-Carlo simulations. Theories that do not have a sign problem can provide valuable guidance and insight for physically more relevant ones that do. Replacing the gauge group SU(3) of QCD by the exceptional group G2, for example, leads to such a theory. It has mesons as well as bosonic and fermionic baryons, and shares many features with QCD. This makes the G2 gauge theory ideally suited to study general properties of dense, strongly-interacting matter, including baryonic and nuclear Fermi pressure effects. Here we present the first-ever results from lattice simulations of G2 QCD with dynamical fermions, providing a first explorative look at the phase diagram of this QCD-like theory at finite temperature and baryon chemical potential.