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Related papers: RHIC predictions from the UrQMD model

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Thermodynamical variables and their time evolution are studied for central relativistic heavy ion collisions from 10.7 to 160 AGeV in the microscopic Ultrarelativistic Quantum Molecular Dynamics model (UrQMD). The UrQMD model exhibits…

Dilepton production in heavy-ion collisions at collider energies - i.e., for the Relativistic Heavy-Ion Collider (RHIC) and the Large Hadron Collider (LHC) - is studied within an approach that uses coarse-grained transport simulations to…

Nuclear Theory · Physics 2016-08-22 Stephan Endres , Hendrik van Hees , Marcus Bleicher

We present a comprehensive study of event-by-event multiplicity fluctuations in nucleon-nucleon and nucleus-nucleus interactions from AGS/FAIR to RHIC energies within the UrQMD transport approach. The scaled variances of negative, positive,…

Nuclear Theory · Physics 2008-11-26 Benjamin Lungwitz , Marcus Bleicher

Two-pion Hanbury-Brown-Twiss (HBT) correlations for central Pb-Pb collisions at the Large-Hadron-Collider (LHC) energy of $\sqrt{s_{NN}}=2.76$ TeV are investigated for the first time with the microscopic transport model UrQMD…

Nuclear Theory · Physics 2012-04-11 Qingfeng Li , Gunnar Graef , Marcus Bleicher

In order to fix the parameters for predictions of hard photon and pion production in $Au+Au$ collisions at $\sqrt{s}=200$ GeV, proton-proton and proton-nucleus data are analyzed in perturbative QCD in the energy range $\sqrt{s} \approx…

High Energy Physics - Phenomenology · Physics 2007-05-23 Gabor Papp , George Fai , Peter Levai

We study the hadron spectra in nearly central $A$+$A$ collisions at RHIC and LHC in a broad transverse momentum range. We cover the low-$p_T$ spectra using longitudinally boost-invariant hydrodynamics with initial energy and net-baryon…

High Energy Physics - Phenomenology · Physics 2008-11-26 K. J. Eskola , H. Honkanen , H. Niemi , P. V. Ruuskanen , S. S. Rasanen

The equilibration of hot and dense nuclear matter produced in the central region in central Au+Au collisions at $\sqrt{s}=200$ AGeV is studied within the microscopic transport model UrQMD. The pressure here becomes isotropic at $t \approx…

We suggest a new theoretical method to describe the baryon clusterization of nuclei in hadron-nucleus reactions. As an example we have explored the nuclei production in $\pi^-+C$ and $\pi^-+W$ collisions at p$_{lab}$=1.7 GeV by using the…

Nuclear Theory · Physics 2024-10-01 A. Ergun , N. Buyukcizmeci , A. Kittiratpattana , T. Reichert , A. S. Botvina , M. Bleicher

Identified hadron spectra and ratios provide a unique tool to study the bulk particle production in heavy-ion collisions and explore the QCD phase diagram. In these proceedings we present the analysis of charged pion, kaon and (anti)proton…

Nuclear Experiment · Physics 2019-08-13 Aneta Iordanova

The kaon to pion ratio $K^+/\pi^+$ and the scaled variance $\omega^-$ for fluctuations of negatively charged particles are studied within the statistical hadron resonance gas (HRG) model and the Ultra relativistic Quantum Molecular Dynamics…

Nuclear Theory · Physics 2019-03-27 A. Motornenko , V. V. Begun , V. Vovchenko , M. I. Gorenstein , H. Stoecker

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…

Nuclear Experiment · Physics 2016-08-03 Ji Xu , Shili Yu , Feng Liu , Xiaofeng Luo

We use the ultra-relativistic quantum molecular dynamic UrQMD version 2.2 to study forward backward fluctuations and compare our results with the published data by the PHOBOS.

Nuclear Theory · Physics 2008-11-26 Stephane Haussler , Mohamed Abdel-Aziz , Marcus Bleicher

High moments of conserved quantities such as net-baryon, net-electric charge, and net-strangeness in heavy-ion collisions are sensitive to fluctuations caused by the QCD critical point (CP). The event-by-event analysis of high moments of…

Nuclear Experiment · Physics 2025-11-06 Xin Zhang , Yu Zhang , Xiaofeng Luo , Nu Xu

The UrQMD transport model is used to study a system-size and energy dependence of the pion production in high energy collisions. New data of the NA61/SHINE Collaboration on spectra of negatively charged pions in proton-proton interactions…

Nuclear Theory · Physics 2014-09-03 V. Yu. Vovchenko , D. V. Anchishkin , M. I. Gorenstein

Transverse momentum spectra of pions, protons and antiprotons in Au+Au collisions at intermediate RHIC energy of $\sqrt{s_{NN}}=62$ GeV are studied in a model that includes both quark coalescence from the dense partonic matter and…

Nuclear Theory · Physics 2009-11-10 V. Greco , C. M. Ko , I. Vitev

The results on the main bulk observables obtained in the simulations within the integrated hydrokinetic model (iHKM) of Au+Au collisions at the RHIC energy $\sqrt{s_{NN}}=200$ GeV are presented along with the corresponding experimental data…

High Energy Physics - Phenomenology · Physics 2019-06-26 M. D. Adzhymambetov , V. M. Shapoval , Yu. M. Sinyukov

The Ultra-relativistic Quantum Molecular Dynamics model is employed to simulate $\pi^-+\mathrm{C}$ and $\pi^-+\mathrm{W}$ collisions at p$_\mathrm{lab}=1.7$ GeV motivated by the recent HADES results. By comparing the proton and $\Lambda$…

In this review article, we first briefly introduce the transport theory and quantum molecular dynamics model applied in the study of the heavy ion collisions from low to intermediate energies. The developments of improved quantum molecular…

Nuclear Theory · Physics 2020-05-27 Yingxun Zhang , Ning Wang , Qingfeng Li , Li Ou , Junlong Tian , Min Liu , Kai Zhao , Xizhen Wu , Zhuxia Li

Estimation of the freeze-out parameters as the function of rapidity in Pb+Pb collisions at $\sqrt{s_{NN}}=72$ GeV in the AFTER@LHC project is performed. The conventional hadron resonance gas model is used for the analysis of the events…

Nuclear Theory · Physics 2018-09-19 Viktor Begun , Daniel Kikoła , Volodymyr Vovchenko , Daniel Wielanek

The Ultrarelativistic Quantum Molecular Dynamics (UrQMD) model, a microscopic transport model, is used to study the directed and elliptic collective flows and the nuclear stopping in Au+Au collisions at incident energies covered by INDRA…

Nuclear Theory · Physics 2011-02-01 Qingfeng Li , Caiwan Shen , Chenchen Guo , Yongjia Wang , Zhuxia Li , J. Lukasik , W. Trautmann