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Transport processes are considered for their abilities to generate flow in a mixed-phase system of hadrons plus quark-gluon plasma exhibiting temperature and density gradients. Diffusive mechanisms are found to be the leading sources. Even…

High Energy Physics - Phenomenology · Physics 2009-11-10 Judith M. Peters , Kevin L. Haglin

In nucleus-nucleus collisions at relativistic energies a new kind of matter is created, the Quark-Gluon Plasma (QGP). The phase diagram of such matter and the chemical freeze-out points will be presented in connection to the pseudo-critical…

High Energy Physics - Phenomenology · Physics 2022-12-27 Peter Braun-Munzinger , Anar Rustamov , Johanna Stachel

High-energy heavy-ion physics and low-energy nuclear structure physics have historically been disconnected fields. The hydrodynamic description of the quark-gluon plasma (QGP) requires input from nuclear structure to model the initial…

Nuclear Theory · Physics 2025-12-08 T. Duguet , G. Giacalone , V. Somà , Y. Zhou

We review hadron formation from a deconfined quark gluon plasma (QGP) via coalescence or recombination of quarks and gluons. We discuss the abundant experimental evidence for coalescence from the Relativistic Heavy Ion Collider (RHIC) and…

Nuclear Theory · Physics 2009-01-01 Rainer J. Fries , Vincenzo Greco , Paul Sorensen

The specific shear viscosity (eta/s)_QGP of quark-gluon plasma (QGP) can be extracted from elliptic flow data in heavy-ion collisions by comparing them with the dynamical model VISHNU which couples a viscous fluid dynamic description of the…

Nuclear Theory · Physics 2012-04-26 Ulrich W. Heinz , Chun Shen , Huichao Song

High-energy heavy-ion collisions provide a unique opportunity to study the properties of the hot and dense strongly-interacting system composed of deconfined quarks and gluons -- the quark-gluon plasma (QGP) -- in laboratory conditions. The…

High Energy Physics - Experiment · Physics 2018-08-07 Mateusz Ploskon

Heavy quarks are powerful tools to characterize the quark-gluon plasma (QGP) produced in relativistic nuclear collisions. By exploiting a mapping between transport theory and hydrodynamics, we developed a fluid-dynamic description of…

The quark-gluon plasma produced by collisions between ultra-relativistic heavy nuclei is well described in the language of hydrodynamics. Non-central collisions are characterized by very large angular momentum, which in a fluid system…

Nuclear Experiment · Physics 2020-03-10 Francesco Becattini , Michael Lisa

The dynamical development of expanding Quark-gluon Plasma (QGP) flow is studied in a 3+1D fluid dynamical model with a globally symmetric, initial condition. We minimize fluctuations arising from complex dynamical processes at finite impact…

Nuclear Theory · Physics 2012-11-27 D. J. Wang , L. P. Csernai , D. Strottman , Cs. Anderlik , Y. Cheng , D. M. Zhou , Y. L. Yan , X. Cai , B. H. Sa

The longitudinal structure of the quark-gluon plasma (QGP) consists of several components spanning various scales. However, its short-range features are often obscured by final-state non-flow correlations. Here, we introduce a data-driven…

Nuclear Theory · Physics 2024-08-28 Jiangyong Jia , Shengli Huang , Chunjian Zhang , Somadutta Bhatta

Yield ratios of identified hadrons observed in high multiplicity p+p and p+Pb collisions at LHC show remarkable similarity with those in Pb+Pb collisions, indicating some important and universal underlying dynamics in hadron production for…

High Energy Physics - Phenomenology · Physics 2017-08-02 Feng-lan Shao , Guo-jing Wang , Rui-qin Wang , Hai-hong Li , Jun Song

The agreement of hydrodynamic predictions of differential elliptic flow and radial flow patterns with Au+Au data is one of the main lines of evidence suggesting the nearly perfect fluid properties of the strongly coupled Quark Gluon Plasma,…

Nuclear Theory · Physics 2008-11-26 Tetsufumi Hirano , Miklos Gyulassy

The major goals of heavy ion research are to explore the phase diagram of quantum chromodynamics (QCD) and to investigate the properties of the quark gluon plasma (QGP), a new state of matter created at high temperatures and/or densities.…

Nuclear Theory · Physics 2015-03-12 Hannah Petersen , Jan Steinheimer , Jussi Auvinen , Marcus Bleicher

At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the Quark-Gluon Plasma (QGP) [1]. Such an extreme state of strongly-interacting QCD (Quantum…

Nuclear Experiment · Physics 2020-08-25 ALICE Collaboration

Measured hadron yields from relativistic nuclear collisions can be equally well understood in two physically distinct models, namely a static thermal hadronic source vs.~a time-dependent, nonequilibrium hadronization off a quark-gluon…

Nuclear Theory · Physics 2011-09-13 C. Spieles , H. Stoecker , C. Greiner

The main goal of the ALICE experiment is to study the physics of strongly interacting matter, focusing on the properties of the quark-gluon plasma (QGP). The relative production of strange hadrons with respect to non-strange hadrons in…

Nuclear Experiment · Physics 2021-12-28 Meenakshi Sharma

Open heavy flavor and quarkonia have long been identified as ideal probes for understanding the quark-gluon plasma (QGP). Heavy quarks are produced in the early stage of the heavy-ion collisions. Therefore they experience the evolution of…

High Energy Physics - Experiment · Physics 2024-11-25 Victor Valencia Torres

Heavy quarks (i.e. charm and beauty) in heavy-ion collisions are initially produced out of kinetic equilibrium via hard partonic scattering processes. However, recent measurements of anisotropic flow of charmed hadrons pose the question…

High Energy Physics - Phenomenology · Physics 2023-12-19 Federica Capellino , Andrea Dubla , Stefan Floerchinger , Eduardo Grossi , Andreas Kirchner , Silvia Masciocchi

There is little doubt that in heavy ion collisions at the LHC and RHIC, we observe a hydrodynamically expanding system, providing strong evidence for the formation of a Quark Gluon Plasma (QGP) in the early stage of such collisions. These…

Nuclear Theory · Physics 2015-06-23 K. Werner , B. Guiot , I. Karpenko , T. Pierog

The phase diagram of quark gluon plasma (QGP) formed at a very early stage just after the heavy ion collision is obtained by using a holographic dual model for the heavy ion collision. In this dual model colliding ions are described by the…

High Energy Physics - Theory · Physics 2012-09-11 I. Ya. Aref'eva , A. A. Bagrov , E. O. Pozdeeva