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Related papers: Beam energy scan using a viscous hydro+cascade mod…

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We apply a 3+1D viscous hydrodynamic + cascade model to the heavy ion collision reactions with $\sqrt{s_{NN}}=6.3\dots39$ GeV. To accommodate the model for a given collision energy range, the initial conditions for hydrodynamic phase are…

Nuclear Theory · Physics 2014-09-08 Iu. Karpenko , M. Bleicher , P. Huovinen , H. Petersen

A state-of-the-art 3+1 dimensional cascade + viscous hydro + cascade model vHLLE+UrQMD has been applied to heavy ion collisions in RHIC Beam Energy Scan range $\sqrt{s_{\rm NN}}=7.7\dots 200$ GeV. Based on comparison to available…

Nuclear Theory · Physics 2016-10-07 Iu. Karpenko , M. Bleicher , P. Huovinen , H. Petersen

Hybrid approaches based on relativistic hydrodynamics and transport theory have been successfully applied for many years for the dynamical description of heavy ion collisions at ultrarelativistic energies. In this work a new viscous hybrid…

Nuclear Theory · Physics 2015-06-09 Iu. A. Karpenko , P. Huovinen , H. Petersen , M. Bleicher

We report on the application of a cascade + viscous hydro + cascade model for heavy ion collisions in the RHIC Beam Energy Scan range, $\sqrt{s_{\rm NN}}=6.3\dots200$ GeV. By constraining model parameters to reproduce the data we find that…

Nuclear Theory · Physics 2016-02-17 Iu. Karpenko , M. Bleicher , P. Huovinen , H. Petersen

In this note we discuss the rapidity dependence of the initial and final conditions for hydrodynamic evolution as well as the resulting basic hadronic observables in heavy ion collisions at $\sqrt{s_{\rm NN}}=72$ GeV in the framework of a…

Nuclear Theory · Physics 2019-03-19 Iurii Karpenko

This work presents the first Bayesian inference study of the (3+1)D dynamics of relativistic heavy-ion collisions and Quark-Gluon Plasma (QGP) viscosities using an event-by-event (3+1)D hydrodynamics + hadronic transport theoretical…

Nuclear Theory · Physics 2023-10-18 Chun Shen , Björn Schenke , Wenbin Zhao

Using a hybrid (viscous hydrodynamics + hadronic cascade) framework, we model the bulk dynamical evolution of relativistic heavy-ion collisions at Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan (BES) collision energies, including…

Nuclear Theory · Physics 2018-03-14 Chun Shen , Gabriel Denicol , Charles Gale , Sangyong Jeon , Akihiko Monnai , Bjoern Schenke

In this article we will review recent measurements of directed flow $v_1$ and elliptic flow $v_2$ in Au+Au collisions from the STAR Beam Energy Scan (BES) program. We systematically analyze the $v_1$ distributions for identified hadrons…

Nuclear Experiment · Physics 2026-03-19 Xionghong He , Shusu Shi , Nu Xu

We determine the probability distributions of shear viscosity over the entropy density ratio $\eta/s$ in Au+Au collisions at $\sqrt{s_{NN}}=19.6, 39$, and $62.4$ GeV, using Bayesian inference and Gaussian process emulators for a…

High Energy Physics - Phenomenology · Physics 2018-04-18 Jussi Auvinen , Iurii Karpenko , Jonah E. Bernhard , Steffen A. Bass

Time evolution of shear viscosity $\eta$, entropy density $s$, and their ratio $\eta / s$ in the central area of central gold-gold collisions at NICA energy range is studied within the UrQMD transport model. The extracted values of energy…

Nuclear Theory · Physics 2020-01-15 M. Teslyk , L. Bravina , O. Panova , O. Vitiuk , E. Zabrodin

Recent analyses of small collision systems, namely $p+p$ and $p+$Pb at the LHC and $p+$Au, $d+$Au and $^{3}$He+Au at RHIC, have revealed azimuthal momentum anisotropies commonly associated with collective flow in larger systems. Viscous…

Nuclear Theory · Physics 2016-05-04 J. D. Orjuela Koop , R. Belmont , P. Yin , J. L. Nagle

A new framework for evaluating hydrodynamic models of relativistic heavy ion collisions has been developed. This framework, a Comprehesive Heavy Ion Model Evaluation and Reporting Algorithm (CHIMERA) has been implemented by augmenting UVH…

Nuclear Theory · Physics 2013-04-10 R. A. Soltz , I. Garishvili , M. Cheng , B. Abelev , A. Glenn , J. Newby , L. A. Linden Levy , S. Pratt

Using the (2+1)-dimensional viscous hydrodynamic code VISH2+1, we present systematic studies of the dependence of pion and proton transverse momentum spectra and their elliptic flow in 200 A GeV Au+Au collisions on the parameters of the…

Nuclear Theory · Physics 2010-12-02 Chun Shen , Ulrich W. Heinz , Pasi Huovinen , Huichao Song

The flow harmonics $v_{2,3}$ for charged hadrons, are studied for a broad range of centrality selections and beam collision energies in Au+Au ($\sqrt{s_{NN}}= 7.7 - 200$ GeV) and Pb+Pb ($\sqrt{s_{NN}}= 2.76$ TeV) collisions. They validate…

Nuclear Experiment · Physics 2013-08-20 Roy A. Lacey , A. Taranenko , J. Jia , D. Reynolds , N. N. Ajitanand , J. M. Alexander , Yi Gu , A. Mwai

We review recent results from the RHIC beam energy scan (BES) program, aimed to study the Quantum Chromodynamics (QCD) phase diagram. The main goals are to search for the possible phase boundary, softening of equation of state or first…

Nuclear Experiment · Physics 2013-11-15 Lokesh Kumar

We present a fully three-dimensional model providing initial conditions for energy and conserved charge density distributions in heavy ion collisions at RHIC Beam Energy Scan (BES) collision energies. The model includes the dynamical…

Nuclear Theory · Physics 2019-02-20 Chun Shen , Björn Schenke

We compute the initial energy densities produced in ultrarelativistic heavy-ion collisions from NLO perturbative QCD using a saturation conjecture to control soft particle production, and describe the subsequent space-time evolution of the…

High Energy Physics - Phenomenology · Physics 2016-11-23 H. Niemi , K. J. Eskola , R. Paatelainen , K. Tuominen

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

A comprehensive viscous hydrodynamic fit of spectra and elliptic flow for charged hadrons and identified pions and protons from Au+Au collisions of all centralities measured at the Relativistic Heavy Ion Collider is performed and used as…

Nuclear Theory · Physics 2012-10-08 Chun Shen , Ulrich W. Heinz , Pasi Huovinen , Huichao Song

We study the collision energy dependence of elliptic flow v_2 and triangular flow v_3 in Au+Au collisions within the energy range sqrt(s_{NN}) = 5-200 GeV, utilizing a transport + hydrodynamics hybrid model. The transport part is described…

Nuclear Theory · Physics 2014-04-11 Jussi Auvinen , Hannah Petersen
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