Cumulants of net-strangeness multiplicity distributions at energies available at the BNL Relativistic Heavy Ion Collider

Abstract

The higher-order cumulants of net-proton number, net-charge, and net-strangeness multiplicity distributions are widely studied to search for the quantum-chromodynamics critical point and extract the chemical freeze-out parameters in heavy-ion collisions. In this context, the event-by-event fluctuations of the net-strangeness multiplicity distributions play important roles in extracting the chemical freeze-out parameter in the strangeness sector. Due to having difficulties in detecting all strange hadrons event by event, the kaon ($K$) and lambda ($\Lambda$) particles serve as a proxy for the strangeness-related observables in heavy-ion collisions. We have studied the net-$K$, net-$\Lambda$, and net-($K$ + $\Lambda$) multiplicity distributions and calculated their different order of cumulants using the ultrarelativistic quantum molecular dynamics model and hadron resonance gas calculation. To adequately account for the net-strangeness cumulants, it has been found that the inclusion of resonance decay contributions in $K$ and $\Lambda$ is necessary.

arXiv commentThe title has been modified. Updated following the published version

References in corpus (30)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Hadron production in central nucleus-nucleus collisions at chemical freeze-out
• Bulk Properties of the Medium Produced in Relativistic Heavy-Ion Collisions from the Beam Energy Scan Program
• Energy Dependence of Moments of Net-proton Multiplicity Distributions at RHIC
• Beam energy dependence of moments of the net-charge multiplicity distributions in Au+Au collisions at RHIC
• THERMUS -- A Thermal Model Package for ROOT
• Freeze-out Conditions in Heavy Ion Collisions from QCD Thermodynamics
• Non-monotonic energy dependence of net-proton number fluctuations
• Relation between baryon number fluctuations and experimentally observed proton number fluctuations in relativistic heavy ion collisions
• Collision Energy Dependence of Moments of Net-Kaon Multiplicity Distributions at RHIC
• Conserved number fluctuations in a hadron resonance gas model
• Strange hadron production in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 7.7, 11.5, 19.6, 27, and 39 GeV
• Multiplicity Fluctuations in Hadron-Resonance Gas
• Impact of resonance regeneration and decay on the net-proton fluctuations in a hadron resonance gas
• Hadron Resonance Gas with Repulsive Interactions and Fluctuations of Conserved Charges
• Freeze-out temperature from net-Kaon fluctuations at RHIC
• Influence of hadronic resonances on the chemical freeze-out in heavy-ion collisions
• Properties and uses of factorial cumulants in relativistic heavy-ion collisions
• Nonequilibrium kinetic freeze-out properties in relativistic heavy ion collisions from energies employed at the RHIC beam energy scan to those available at the LHC
• Resonance decay effect on conserved number fluctuations in a hadron resonance gas model
• Effects of volume corrections and resonance decays on cumulants of net-charge distributions in a Monte Carlo hadron resonance gas model
• Diagonal and off-diagonal susceptibilities of conserved quantities in relativistic heavy-ion collisions
• Baseline for the cumulants of net-proton distributions at STAR
• Beam energy dependence of net-$\Lambda$ fluctuations measured by the STAR experiment at RHIC
• Systematics of chemical freeze-out parameters in heavy-ion collision experiments
• Centrality dependence of chemical freeze-out parameters and strangeness equilibration in RHIC and LHC energies
• Novel scheme for parametrizing the chemical freeze-out surface in Heavy Ion Collision Experiments
• Formation of light nuclei at chemical freezeout: Description within a statistical thermal model
• Recent theoretical developments on QCD matter at finite temperature and density