The phase diagram of a gauge theory with fermionic baryons

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.

5 pages, 5 figures, v2: extended discussion of vacuum physics and chiral symmetry added, some other minor improvements

References in corpus (12)

• Deconfinement in dense 2-color QCD
• Exceptional Deconfinement in G(2) Gauge Theory
• Color Screening, Casimir Scaling, and Domain Structure in G(2) and SU(N) Gauge Theories
• The QCD phase diagram: Results and challenges
• Universal Aspects of QCD-like Theories
• G_2 gauge theory at finite temperature
• Casimir Scaling and String Breaking in G(2) Gluodynamics
• Lattice Study of Dense Matter with Two Colors and Four Flavors
• Casimir scaling in G(2) lattice gauge theory
• Chiral symmetry and spectral properties of the Dirac operator in G2 Yang-Mills Theory
• Phase diagram of the lattice G(2) Higgs Model
• Adjoint quarks and fermionic boundary conditions

Cited by in corpus (11)

• Fluctuations in the quark-meson model for QCD with isospin chemical potential
• Towards the phase diagram of dense two-color matter
• Complex Langevin dynamics and other approaches at finite chemical potential
• Universal Aspects of QCD-like Theories
• Exceptional thermodynamics: The equation of state of G(2) gauge theory
• Continuum Goldstone spectrum of two-color QCD at finite density with staggered quarks
• Phase structure and propagators at nonvanishing temperature for QCD and QCD-like theories
• Center phase transition from matter propagators in (scalar) QCD
• Condensation phenomena in two-flavor scalar QED at finite chemical potential
• Color screening in flux tubes and in the color Coulomb potential from the QCD Field Correlators
• Strongly Interacting Dark Matter admixed Neutron Stars