Strangeness neutrality and the QCD phase diagram
Abstract
Since the incident nuclei in heavy-ion collisions do not carry strangeness, the global net strangeness of the detected hadrons has to vanish. We show that there is an intimate relation between strangeness neutrality and baryon-strangeness correlations. In the context of heavy-ion collisions, the former is a consequence of quark number conservation of the strong interactions while the latter are sensitive probes of the character of QCD matter. We investigate the sensitivity of baryon-strangeness correlations on the freeze-out conditions of heavy-ion collisions by studying their dependence on temperature, baryon- and strangeness chemical potential. The impact of strangeness neutrality on the QCD equation of state at finite chemical potentials will also be discussed. We model the low-energy sector of QCD by an effective Polyakov loop enhanced quark-meson model with 2+1 dynamical quark flavors and use the functional renormalization group to account for the non-perturbative quantum fluctuations of hadrons.
Cite
@article{arxiv.1907.08179,
title = {Strangeness neutrality and the QCD phase diagram},
author = {Fabian Rennecke and Wei-jie Fu and Jan M. Pawlowski},
journal= {arXiv preprint arXiv:1907.08179},
year = {2019}
}
Comments
15 pages, 6 Figures; Contribution to the proceedings of the CPOD2018 conference