Proton correlations and apparent intermittency in the UrQMD model with hadronic potentials

Abstract

It is shown that the inclusion of hadronic interactions, and in particular nuclear potentials, in simulations of heavy ion collisions at the SPS energy range can lead to obvious correlations of protons. These correlations contribute significantly to an intermittency analysis as performed at the NA61 experiment. The beam energy and system size dependence is studied by comparing the resulting intermittency index for heavy ion collisions of different nuclei at beam energies of $40A$, $80A$ and $150A$ GeV. The resulting intermittency index from our simulations is similar to the reported values of the NA61 collaboration, if nuclear interactions are included. The observed apparent intermittency signal is the result of the correlated proton pairs with small relative transverse momentum $\Delta p_t$, which would be enhanced by hadronic potentials, and this correlation between the protons is slightly influenced by the coalescence parameters and the relative invariant four-momentum $q_{inv}$ cut.

6 pages, 6 figures

References in corpus (11)

• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• The equation of state in (2+1)-flavor QCD
• Skewness and kurtosis of net baryon-number distributions at small values of the baryon chemical potential
• Centrality dependence of hadronization and chemical freeze-out conditions in heavy ion collisions at \sqrt s_{NN} = 2.76 TeV
• Critical Opalescence in Baryonic QCD Matter
• An overview of the experimental study of quark-gluon matter in high-energy nucleus-nucleus collisions
• The effect of "pre-formed" hadron potentials on the dynamics of heavy ion collisions and the HBT puzzle
• Effects of Nuclear Potential on the Cumulants of Net-Proton and Net-Baryon Multiplicity Distributions in Au+Au Collisions at $\sqrt{s_{\text{NN}}}=5\text{GeV}$
• A model comparison of resonance lifetime modifications, a soft equation of state and non-Gaussian effects on $\pi -\pi$ correlations at FAIR/AGS energies
• Transport model study of the $m_T$-scaling for $\Lambda$, K, and $\pi$ HBT-correlations
• 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

Cited by in corpus (8)

• Energy Dependence of Intermittency for Charged Hadrons in Au+Au Collisions at RHIC
• Intermittency analysis of proton numbers in heavy-ion collisions at energies available at the BNL Relativistic Heavy Ion Collider
• Overview of intermittency analysis in heavy-ion collisions
• Measurement of Intermittency for Charged Particles in Au + Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 7.7-200 GeV from STAR
• Effects of Initial Density Fluctuations on Cumulants in Au + Au Collisions at $\sqrt{s_{NN}}$ = 7.7 GeV
• Intermittency of charged particles in the hybrid UrQMD+CMC model at energies available at the BNL Relativistic Heavy Ion Collider
• A novel filtering method for generating desired density profiles of colliding nuclei
• Intermittency analysis in relativistic heavy-ion collisions