Thermodynamics of strongly interacting matter in a hybrid model
Abstract
The equation of state and fluctuations of conserved charges in a strongly interacting medium under equilibrium conditions form the baseline upon which various possible scenarios in relativistic heavy-ion collision experiments are built. Many of these quantities have been obtained in the lattice QCD framework with reliable continuum extrapolations. Recently the PolyakovNambuJona-Lasinio model has been reparametrized to some extent to reproduce quantitatively the lattice QCD equation of state at vanishing chemical potentials. The agreement was precise except at low temperatures, possibly due to inadequate representation of the hadronic degrees of freedom in the model. This disagreement was also observed for some of the fluctuation and correlations considered. Here we address this issue by introducing the effects of hadrons through the Hadron Resonance Gas model. The total thermodynamic potential is now a weighted sum of the thermodynamic potential of the PolyakovNambuJona-Lasinio model and that of the Hadron Resonance Gas model. We find that the equation of state and the fluctuations and correlations obtained in this hybrid model agrees satisfactorily with the lattice QCD data in the low temperature regime.
Keywords
Cite
@article{arxiv.1708.04549,
title = {Thermodynamics of strongly interacting matter in a hybrid model},
author = {Abhijit Bhattacharyya and Sanjay K. Ghosh and Soumitra Maity and Sibaji Raha and Rajarshi Ray and Kinkar Saha and Subhasis Samanta and Sudipa Upadhaya},
journal= {arXiv preprint arXiv:1708.04549},
year = {2019}
}
Comments
17 pages, 10 figures. arXiv admin note: text overlap with arXiv:1609.07882