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Description of relativistic heavy-ion collisions at the energies of RHIC Beam Energy Scan program with fluid dynamic approach poses several challenges, one of which being a complex geometry and a longer duration of the pre-hydrodynamic…

Nuclear Theory · Physics 2021-04-26 Jakub Cimerman , Iurii Karpenko , Boris Tomášik , Barbara Antonina Trzeciak

We study the initial three-dimensional spatial configuration of the quark-gluon plasma produced in relativistic heavy-ion collisions using centrality and rapidity-dependent measurements of charged particle pseudorapidity densities and…

Nuclear Theory · Physics 2017-11-01 Weiyao Ke , J. Scott Moreland , Jonah E. Bernhard , Steffen A. Bass

Using next-to-leading order perturbative QCD and a conjecture of saturation to suppress the production of low-energy partons, we calculate the initial energy densities and formation times for the dissipative fluid dynamical evolution of the…

High Energy Physics - Phenomenology · Physics 2015-06-17 R. Paatelainen , K. J. Eskola , H. Niemi , K. Tuominen

In this paper we conduct a systematic study of the granularity of the initial state of hot and dense QCD matter produced in ultra-relativistic heavy-ion collisions and its influence on bulk observables like particle yields, $m_T$ spectra…

Nuclear Theory · Physics 2011-03-18 Hannah Petersen , Christopher Coleman-Smith , Steffen A. Bass , Robert Wolpert

We extend the well-studied midrapidity TRENTo initial-conditions model to three dimensions, thus facilitating (3+1)D modeling and analysis of ultrarelativistic heavy-ion collisions at RHIC and LHC energies. TRENTo-3D is a fast, parametric…

Nuclear Theory · Physics 2023-06-16 Derek Soeder , Weiyao Ke , J. -F. Paquet , Steffen A. Bass

Relativistic collisions of light on heavy ions (p+Au at sqrt(s)=7.7 GeV, p+Au, d+Au,3He+Au at sqrt(s)=62.4 GeV and 200 GeV and p+Pb, 3He+Pb at sqrt(s)=5.02 TeV) are simulated using "superSONIC", a model that includes pre-equilibrium flow,…

Nuclear Theory · Physics 2015-02-18 Paul Romatschke

We quantitatively estimate properties of the quark-gluon plasma created in ultra-relativistic heavy-ion collisions utilizing Bayesian statistics and a multi-parameter model-to-data comparison. The study is performed using a recently…

Nuclear Theory · Physics 2016-08-22 Jonah E. Bernhard , J. Scott Moreland , Steffen A. Bass , Jia Liu , Ulrich Heinz

We use perfect-fluid hydrodynamical model to predict the elliptic flow coefficients in Pb + Pb collisions at the Large Hadron Collider (LHC). The initial state for the hydrodynamical calculation for central $A + A$ collisions is obtained…

High Energy Physics - Phenomenology · Physics 2009-03-04 H. Niemi , K. J. Eskola , P. V. Ruuskanen

We present calculations of bulk properties and multiparticle correlations in a large variety of collision systems within a hybrid formalism consisting of IP-Glasma initial conditions, MUSIC viscous relativistic hydrodynamics, and UrQMD…

Nuclear Theory · Physics 2020-10-21 Bjoern Schenke , Chun Shen , Prithwish Tribedy

We study the directed flow of identified particles in Au+Au collisions at $\sqrt{s_\text{NN}}=7.7$ to 62.4 GeV. The Glauber model is extended to include both a tilted deformation of the QGP fireball with respect to the longitudinal…

Nuclear Theory · Physics 2023-03-10 Ze-Fang Jiang , Xiang-Yu Wu , Shanshan Cao , Ben-Wei Zhang

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 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

Posterior distributions for physical parameters describing relativistic heavy-ion collisions, such as the viscosity of the quark-gluon plasma, are extracted through a comparison of hydrodynamic-based transport models to experimental results…

Nuclear Theory · Physics 2015-06-15 John Novak , Kevin Novak , Scott Pratt , J. Vredevoogd , Chris Coleman-Smith , Robert Wolpert

We perform a study of electromagnetic radiation in heavy-ion collisions at Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan (BES) and SPS energies using the iEBE-MUSIC framework, which includes 3D dynamical Monte Carlo Glauber…

Nuclear Theory · Physics 2025-11-13 Xiang-Yu Wu , Charles Gale , Sangyong Jeon , Jean-François Paquet , Björn Schenke , Chun Shen

Using a (2+1)-d viscous hydrodynamical model, we study the dependence of flow observables on the collision energy ranging from sqrt(s)=7.7 A GeV at the Relativistic Heavy Ion Collider (RHIC) to sqrt(s)=2760 A GeV at the Large Hadron…

Nuclear Theory · Physics 2012-10-08 Chun Shen , Ulrich Heinz

The initial conditions in heavy-ion collisions are calculated in many different frameworks. The importance of nucleon position fluctuations within the nucleus and sub-nucleon structure has been established when modeling initial conditions…

Nuclear Theory · Physics 2021-02-17 R. Snyder , M. Byres , S. H. Lim , J. L. Nagle

Within the framework of the coalescence model based on the phase-space distributions of protons and neutrons generated from the {{\tt iEBE-VISHNU}} hybrid model with {{\tt AMPT}} initial conditions, we study the spectra and elliptic flow of…

Nuclear Theory · Physics 2018-11-28 Wenbin Zhao , Lilin Zhu , Hua Zheng , Che Ming Ko , Huichao Song

We present an attempt to closely mimic the initial stage of heavy ion collisions within holography, assuming a decoupling of longitudinal and transverse dynamics in the very early stage. We subsequently evolve the obtained initial state…

Nuclear Theory · Physics 2015-12-16 Wilke van der Schee , Bjoern Schenke

We present a fully three-dimensional initial state model for relativistic heavy-ion collisions at RHIC Beam Energy Scan (BES) collision energies. The initial energy and net baryon density profiles are produced based on a classical string…

Nuclear Theory · Physics 2017-11-30 Chun Shen , Björn Schenke

Four models for the initial conditions of a fluid dynamic description of high energy heavy ion collisions are analysed and compared. We study expectation values and event-by-event fluctuations in the initial transverse energy density…

High Energy Physics - Phenomenology · Physics 2020-12-01 Stefan Floerchinger , Eduardo Grossi , Kianusch Vahid Yousefnia
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