Entropy per Baryon in Strong Coupling QCD

TL;DR

This paper investigates the entropy per baryon in strong coupling lattice QCD at large dimensions, revealing a nearly continuous transition across phases, with implications for understanding heavy ion collisions.

Contribution

It introduces a $1/d$ expansion approach to compute the entropy per baryon in lattice QCD with non-zero chemical potential and temperature.

Findings

Entropy per baryon ratio is nearly continuous across phase transition.

Results are relevant for interpreting heavy ion collision experiments.

The study extends understanding of phase transitions in strong coupling QCD.

Abstract

The entropy per baryon is studied in the strong coupling large dimension $d$ limit of lattice QCD with staggered fermions. The partition function is calculated for non-zero chemical potential and temperature using the $1/d$ expansion. It is found that the entropy per baryon ratio is almost continuous across the transition from the the quark-gluon to the hadronic phase. The relevance of these results for heavy ion collisions is discussed.