Flavour and Energy Dependence of Chemical Freeze-out Temperatures in Relativistic Heavy Ion Collisions from RHIC-BES to LHC Energies

Abstract

We present calculations of the chemical freeze-out temperature (T_ch) based on particle yields from STAR and ALICE measured at collision energies ranging from sqrt{s_{NN}} = 11.5 GeV to 5.02 TeV. Employing the Grand Canonical Ensemble approach using the Thermal-FIST Hadron Resonance Gas model package, we show evidence for a flavour-dependent chemical freeze-out in the crossover region of the QCD phase diagram. At a vanishing baryochemical potential, we calculate light and strange flavour freeze-out temperatures T_L = 150.2 +- 2.6 MeV and T_S = 165.1 +- 2.7 MeV, respectively.

6 pages, 4 figures, 2 tables. Submitted to and accepted by Physics Letters B

References in corpus (10)

• The equation of state in (2+1)-flavor QCD
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• The QCD crossover at finite chemical potential from lattice simulations
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Freeze-out conditions from net-proton and net-charge fluctuations at RHIC
• Additional Strange Hadrons from QCD Thermodynamics and Strangeness Freeze-out in Heavy Ion Collisions
• Strange and Multi-strange Particle Production in Au+Au Collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
• Off-diagonal correlators of conserved charges from lattice QCD and how to relate them to experiment
• Influence of hadronic resonances on the chemical freeze-out in heavy-ion collisions
• Understanding the $p/\pi$ ratio at LHC due to QCD mass spectrum

Cited by in corpus (15)

• The ALICE experiment: a journey through QCD
• Repulsive properties of hadrons in lattice QCD data and neutron stars
• System Size and Flavour Dependence of Chemical Freeze-out Temperatures in ALICE Data from pp, pPb and PbPb Collisions at LHC Energies
• Strange quark matter as dark matter: 40 years later, a reappraisal
• Diffusion and fluctuations of open charmed hadrons in an interacting hadronic medium
• Observation of the $\Omega$(2012) baryon at the LHC
• QCD Phase Boundary and the Hadrochemical Horizon
• Effect of Light Nuclei on Chemical Freeze-out Parameters at RHIC Energies
• Corrections to the hadron resonance gas from lattice QCD and their effect on fluctuation-ratios at finite density
• Constraining the hadronic spectrum and repulsive interactions in a hadron resonance gas via fluctuations of conserved charges
• Variations of the crossover and first-order phase transition curve in modeling the QCD equation of state
• QCD phase transition at finite temperature and chemical potential with the non-extensive statistics
• Flavour-Dependent Chemical Freeze-Out of Light Nuclei in Relativistic Heavy-Ion Collisions
• Systematics of the chemical freeze-out line in the high baryon density regime explored at SIS100
• Smooth matching of $\hat{q}$ from hadronic to quark and gluon degrees of freedom