Cumulants of Net-Proton, Net-Kaon and Net-Charge Multiplicity Distributions in Au+Au Collisions at RHIC BES Energies from UrQMD Model

Abstract

Fluctuations of conserved quantities are sensitive observables to probe the signature of QCD phase transition and critical point in heavy-ion collisions. With the UrQMD model, we have studied the centrality and energy dependence of various order cumulants and cumulant ratios (up to fourth order) of net-proton,net-charge and net-kaon multiplicity distributions in Au+Au collisions at $\sqrt{s_{NN}}$= 7.7, 11.5, 19.6, 27, 39, 62.4, 200 GeV. The model results show that the production mechanism of the particles and anti-particles have significant impacts on the cumulants of net-particles multiplicity distributions and show strong energy dependence. We also made comparisons between model calculations and experimental data measured in the first phase of the beam energy scan (BES) program by the STAR experiment at RHIC. The comparisons indicate that the baryon conservation effect strongly suppress the cumulants of net-proton distributions at low energies and the non-monotonic energy dependence for the net-proton {\KV} at the most central Au+Au collisions measured by the STAR experiment can not be described by the UrQMD model. Since there has no physics of QCD phase transition and QCD critical point implemented in the UrQMD, the model results provide us baselines and qualitative estimates about the non-critical background contributions to the fluctuations observables in heavy-ion collisions.

9 pages, 10 figures

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Cited by in corpus (27)

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• Collision Energy Dependence of Moments of Net-Kaon Multiplicity Distributions at RHIC
• A Study of the Properties of the QCD Phase Diagram in High-Energy Nuclear Collisions
• Proton number cumulants and correlation functions in Au-Au collisions at $\sqrt{s_{\mathrm{NN}}}=7.7-200$ GeV from hydrodynamics
• Beam Energy dependence of Light Nuclei Production in Au+Au Collisions
• Effects of Nuclear Potential on the Cumulants of Net-Proton and Net-Baryon Multiplicity Distributions in Au+Au Collisions at $\sqrt{s_{\text{NN}}}=5\text{GeV}$
• Critical point of nuclear matter and beam energy dependence of net proton number fluctuations
• Proton Cumulants and Correlation Functions in Au + Au Collisions at $\sqrt{s_{\mathrm{NN}}}$=7.7-200 GeV from UrQMD Model
• Centrality selection effect on higher-order cumulants of net-proton multiplicity distributions in relativistic heavy-ion collisions
• Diagonal and off-diagonal susceptibilities of conserved quantities in relativistic heavy-ion collisions
• Measuring neutron skin by grazing isobaric collisions
• Identifying the presence of the critical end point in QCD phase diagram by higher order susceptibilities
• Non-critical fluctuations of (net) charges and (net) protons from iEBE-VISHNU hybrid model
• Baryon-Strangeness Correlations in Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$=7.7-200 GeV from the UrQMD model
• Collision energy dependence of the critical end point from baryon number fluctuations in the Linear Sigma Model with quarks
• Statistical moments in superposition models and strongly intensive measures
• Effects of resonance weak decays and hadronic re-scattering on the proton number fluctuations in Au + Au collisions at $\sqrt{s_{\mathrm{NN}}}=5$ GeV from JAM model
• Event-by-Event Efficiency Fluctuations and Efficiency Correction for Cumulants of Superposed Multiplicity Distributions in Relativistic Heavy-ion Collision Experiments
• Effects of centrality fluctuation and deuteron formation on proton number cumulant in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 3 GeV from JAM model
• Fluctuations of identified particle yields using the ν dyn variable at energies available at the BNL Relativistic Heavy Ion Collider
• Efficiency corrections for mutually inclusive variables and particle identification effect for mixed-cumulants in heavy-ion collisions
• Energy and system size dependence of strongly intensive fluctuation measures in heavy-ion collisions at FAIR energies
• Statistical method in quark combination model
• Baseline study for net-proton number fluctuations at top energies available at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider with the Angantyr model
• Cumulants of conserved charges in hydrodynamic simulations
• Study of diffusion coefficients of identified particles at energies available at BNL Relativistic Heavy Ion Collider