Flavour-Dependent Chemical Freeze-Out of Light Nuclei in Relativistic Heavy-Ion Collisions

Abstract

We study the production of light nuclei in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 7.7 - 200 GeV and Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 and 5.02 TeV within a flavour-dependent freeze-out framework, assuming different flavoured hadrons undergo separate chemical freeze-out. Using the Thermal-FIST package, thermal parameters extracted from fits to various sets of hadron yields, including and excluding light nuclei, are used to calculate the ratios of the yields of light nuclei, namely, $d/p$, $\bar{d}/\bar{p}$, $t/p$, and $t/d$. A comparison with data from the STAR and ALICE collaborations shows that a sequential freeze-out scenario provides a better description of light nuclei yield ratios than the traditional single freeze-out approach. These results suggest the flavour-dependent chemical freeze-out for final state light-nuclei production persists in heavy-ion collisions at both RHIC and LHC energies.

arXiv comment9 pages, 6 figures, 1 table, and 1 appendix table. Version published in EPJC: Eur. Phys. J. C 85, 1084 (2025)

References in corpus (39)

• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• Thermal phenomenology of hadrons from 200 AGeV S+S collisions
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Decoding the phase structure of QCD via particle production at high energy
• Bulk Properties of the Medium Produced in Relativistic Heavy-Ion Collisions from the Beam Energy Scan Program
• Production of light nuclei, hypernuclei and their antiparticles in relativistic nuclear collisions
• Unified Description of Freeze-Out Parameters in Relativistic Heavy Ion Collisions
• Production of charged pions, kaons and (anti-)protons in Pb-Pb and inelastic pp collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Production of light nuclei and anti-nuclei in pp and Pb-Pb collisions at LHC energies
• Canonical partition function and finite density phase transition in lattice QCD
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• ${}_{\Lambda }^3\mathrm{H}$ and ${}_{\bar{\Lambda }}^3\overline{\mathrm{H}}$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Is there a flavor hierarchy in the deconfinement transition of QCD?
• Phi meson production in Au+Au and p+p collisions at sqrt (s)=200 GeV
• Thermal-FIST: A package for heavy-ion collisions and hadronic equation of state
• The ALICE experiment: a journey through QCD
• Strangeness Enhancement in Cu+Cu and Au+Au Collisions at \sqrt{s_{NN}} = 200 GeV
• Strange hadron production in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 7.7, 11.5, 19.6, 27, and 39 GeV
• Beam energy dependence of (anti-)deuteron production in Au+Au collisions at RHIC
• Production of deuterium, tritium, and ${}^3$He in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV at the CERN SPS
• Strange freezeout
• Chemical Freeze-out of Strange Particles and Possible Root of Strangeness Suppression
• Production of Light Nuclei in Heavy Ion Collisions Within Multiple Freezeout Scenario
• Are there hadronic bound states above the QCD transition temperature?
• Finite resonance widths influence the thermal-model description of hadron yields
• Beam Energy Dependence of Triton Production and Yield Ratio (${\mathrm{N}}_t\times {\mathrm{N}}_p/{\mathrm{N}}_d^2$) in Au+Au Collisions at RHIC
• Nucleosynthesis in heavy-ion collisions at the LHC via the Saha equation
• Kinetic freeze-out temperature from yields of short-lived resonances
• Flavour and Energy Dependence of Chemical Freeze-out Temperatures in Relativistic Heavy Ion Collisions from RHIC-BES to LHC Energies
• Light (anti)nuclei production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Overview of light nuclei production in relativistic heavy-ion collisions
• Evidence for chemical equilibration at RHIC
• Observation of the Antimatter Hypernucleus ${}_{\bar{\Lambda }}^4\overline{H}$
• System Size and Flavour Dependence of Chemical Freeze-out Temperatures in ALICE Data from pp, pPb and PbPb Collisions at LHC Energies
• Testing the system size dependence of hydrodynamical expansion and thermal particle production with $\pi$, K, p, and $\varphi$ in Xe-Xe and Pb-Pb collisions with ALICE
• Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Measurement of ${}_{\Lambda }^3\mathrm{H}$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Effect of Light Nuclei on Chemical Freeze-out Parameters at RHIC Energies