Effects of a non-zero strangeness-chemical potential in strong interaction models

TL;DR

This paper investigates how a non-zero strangeness chemical potential influences the phase diagram of strong interactions, revealing that it turns the chiral phase transition from first-order to a crossover, with potential experimental implications.

Contribution

It introduces the effects of a non-zero strangeness chemical potential on the strong interaction phase diagram within an SU(3) quark-hadron model, showing the disappearance of the first-order transition line.

Findings

Chiral phase transition line becomes a crossover.

Modifications in susceptibilities could be detectable in experiments.

Nuclear liquid-gas transition is also affected.

Abstract

The effect of a non-zero strangeness chemical potential on the strong interaction phase diagram has been studied within the framework of the SU(3) quark-hadron chiral parity-doublet model. Both, the nuclear liquid-gas and the chiral/deconfinement phase transitions are modified. The first-order line in the chiral phase transition is observed to vanish completely, with the entire phase boundary becoming a crossover. These changes in the nature of the phase transitions are expected to modify various susceptibilities, the effects of which might be detectable in particle-number distributions resulting from moderate-temperature and high-density heavy-ion collision experiments.