Abstract
We present a new event generator based on the three-fluid hydrodynamics (3FH) approach, followed by a particlization at the hydrodynamic decoupling surface and a subsequent UrQMD afterburner stage based on the microscopic UrQMD transport model that accounts for hadronic final state interactions. First results for Au+Au collisions are presented. The following topics are addressed: the directed flow, transversemass spectra, as well as rapidity distributions of protons, pions and kaons for two model equations of state, one with a first-order phase transition, the other with a crossover transition. Preliminary results on the femtoscopy are also discussed.We analyze the accuracy of reproduction of the 3FH results by the new event generator and the effect of the subsequent UrQMD afterburner stage.
Highlights
We present a new Three-fluid Hydrodynamics-based Event Simulator Extended by Ultra-relativistic Quantum Molecular Dynamics (UrQMD) final State interactions (THESEUS) [14] and its application to the description of heavy-ion collisions in the FAIR-Nuclotronbased Ion Collider fAcility (NICA)-SPS-beam-energy scan (BES)/Relativistic Heavy-Ion Collider (RHIC) energy range
√ we present a selection of first results from THESEUS for the energy scan planned at the NICA-MPD collider experiment, which has overlap with the FAIR-SPSBES/RHIC energy range
We present the results of THESEUS with and without UrQMD afterburner for the directed flow v1 of protons and pions at Elab = 8 A GeV (Fig. 5) and 30 A GeV (Fig. 6), comparing the case of the 2-phase equation of state (EoS) with that of the crossover EoS at central, semicentral and peripheral Au+Au collisions
Summary
EPJ Web of Conferences constructing the Facility for Antiproton and Ion Research (FAIR) in Darmstadt [3] and the Nuclotronbased Ion Collider fAcility (NICA) in Dubna [4]. From the practical point of view, the model was not well suited for data simulations in terms of experimental events, because the model output consisted of fluid characteristics rather than of a set of observable particles In this contribution, we present a new Three-fluid Hydrodynamics-based Event Simulator Extended by UrQMD final State interactions (THESEUS) [14] and its application to the description of heavy-ion collisions in the FAIR-NICA-SPS-BES/RHIC energy range. We present a new Three-fluid Hydrodynamics-based Event Simulator Extended by UrQMD final State interactions (THESEUS) [14] and its application to the description of heavy-ion collisions in the FAIR-NICA-SPS-BES/RHIC energy range This simulator provides a solution to both the above-mentioned problems. Later by an event we mean a Monte Carlo sampled set of final hadrons, which correspond to the same (average) hydrodynamic evolution
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