Equations of state based on recent lattice QCD results at vanishing net-baryon density

14th Conference on Theoretical Nuclear Physics in Italy

Alba, P.^1 ; Alberico, W.^1 ; Beraudo, A.^2 ; Bluhm, M.^3 ; Ratti, C.^1

Dipartimento di Fisica, Università Degli Studi di Torino, Sezione di Torino, via Giuria 1, I-10125 Torino, Italy^1

Physics Department, Theory Unit, CERN, CH-1211 Genève 23, Switzerland^2

Department of Physics, North Carolina State University, Raleigh, NC 27695, United States^3

关键词: Baryon density;    Chemical equilibriums;    Freeze out temperature;    Hadron resonance gas;    High temperature;    Hydrodynamic model;    Low temperatures;    Relativistic heavy ion collision;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/527/1/012014/pdf
DOI  :  10.1088/1742-6596/527/1/012014

来源: IOP

【 摘 要 】

We calculate various equations of state for QCD matter at vanishing net-baryon density starting from recent lattice QCD results at high temperatures, going to low temperatures using a hadron resonance gas (HRG) model to describe the confined phase. In order to have a better description of the experimental situation we use an implementation of the HRG model that allows the system to switch, after the chemical freeze-out, to a situation of partial chemical equilibrium. We explore the possibility of different freeze-out temperatures. Our results can be used in the hydrodynamic modeling of relativistic heavy-ion collisions at the LHC and at the highest RHIC beam energies.