The pressure of strong coupling lattice QCD with heavy quarks, the hadron resonance gas model and the large N limit

Understand

In this paper we calculate the pressure of pure lattice Yang-Mills theories and lattice QCD with heavy quarks by means of strong coupling expansions.

• Dynamical fermions are introduced with a hopping parameter expansion, which also allows for the incorporation of finite quark chemical potential.
• We show that in leading orders the results are in full agreement with expectations from the hadron resonance gas model, thus validating it with a first principles calculation.
• For pure Yang-Mills theories we obtain the corresponding ideal glueball gas, in QCD with heavy quarks our result equals that of an ideal gas of mesons and baryons.