Baryon clustering at the critical line and near the hypothetical critical point in heavy-ion collisions

Abstract

We study clustering of baryons at the freeze-out point of relativistic heavy-ion collisions. Using a Walecka-Serot model for the nucleon-nucleon (NN) interaction we analyze how the modified/critical $\sigma$ mode---responsible for the NN attraction---allows for clustering of nucleons when the system is close to a possible critical point of QCD. We investigate clusters of few nucleons, and also the internal cluster configuration when the system is long lived. For realistic heavy-ion collisions we study to how extend such clusters can be formed in a finite time, and perform the statistical analysis of cumulants and higher-order moments (skewness and kurtosis) for collisions at the Beam Energy Scan of RHIC.

arXiv commentl additions: (i) about small clusters with 4 nucleons, contributing to He4 production; (ii) inter-baryon potential from functional renormalization group results

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• Baryon preclustering at the freeze-out of heavy-ion collisions and light-nuclei production
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• Beam Energy dependence of Light Nuclei Production in Au+Au Collisions
• Light nuclei production in relativistic heavy ion collisions from the AMPT model
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• Deuteron yields from LHC: Continuum correlations and in-medium effects
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• Applications of Persistent Homology in Nuclear Collisions
• Event-by-event anti-deuteron multiplicity fluctuation in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
• Probing the boundary of phase transition of nuclear matter using proton flows in heavy-ion collisions at 2-8 GeV/nucleon
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• Many-body forces and nucleon clustering near the QCD critical point
• Nonuniform-temperature effects on the phase transition in an Ising-like model
• Nucleon clustering at kinetic freezeout of heavy-ion collisions via path-integral Monte Carlo
• Beam energy dependence of cumulants of the net-baryon, net-charge and deuteron multiplicity distributions in Au+Au collisions at $\sqrt{s_{NN}}=3.0-5.0$ GeV
• Collision-energy Dependence of Deuteron Cumulants and Proton-deuteron Correlations in Au+Au collisions at RHIC
• Critical point particle number fluctuations from molecular dynamics
• Effects of Initial Density Fluctuations on Cumulants in Au + Au Collisions at $\sqrt{s_{NN}}$ = 7.7 GeV
• Imprints of clustering in multiplicity fluctuations