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Relativistic hydrodynamics for ideal and viscous fluids is discussed as a tool to describe relativistic heavy-ion collisions and to extract transport properties of the quark-gluon plasma from experimentally measured hadron momentum spectra.

核理论 · 物理学 2015-05-13 Ulrich W. Heinz

Elliptic flow of deuterons is measured on simulated collisions events of Pb+Pb at CMS energy of 2.76 TeV per colliding nucleon pair. We use hybrid model that includes hydrodynamics for the deconfined phase and hadron transport as an…

核理论 · 物理学 2026-03-10 Tomas Polednicek , Radka Vozabova , Boris Tomasik

In this work, we assess the importance of non-equilibrium dynamics in the production of photons from the late stages of relativistic heavy-ion collisions. The p$_\mathrm{T}$-differential spectra and $v_2$ of photons from the late hadronic…

高能物理 - 唯象学 · 物理学 2022-06-15 Anna Schäfer , Oscar Garcia-Montero , Jean-François Paquet , Hannah Elfner , Charles Gale

In this proceeding, we review our recent work using deep convolutional neural network (CNN) to identify the nature of the QCD transition in a hybrid modeling of heavy-ion collisions. Within this hybrid model, a viscous hydrodynamic model is…

Direct photons provide a insightful tool to study the different stages of a heavy ion collision, especially the formation of a quark-gluon plasma, without being influenced by the strong interaction and hadronization processes. The yield of…

核实验 · 物理学 2007-05-23 Haijiang Gong

Our recently developed 2+1 (boost-invariant) hydrodynamic model has been presented and used to i) describe the soft hadronic data collected in the central region of the relativistic heavy-ion collisions at RHIC and ii) to make predictions…

核理论 · 物理学 2011-02-02 Mikolaj Chojnacki

The relativistic hydrodynamics together with the single-freeze-out statistical hadronization model is used to describe the midrapidity hadron production in ultra-relativistic heavy-ion collisions at RHIC and LHC. At the highest RHIC energy…

核理论 · 物理学 2008-12-19 Wojciech Florkowski , Mikolaj Chojnacki , Wojciech Broniowski , Adam Kisiel

Hadronic transport approaches based on an effective solution of the relativistic Boltzmann equation are widely applied for the dynamical description of heavy ion reactions at low beam energies. At high densities, the assumption of binary…

核理论 · 物理学 2017-02-14 Dmytro Oliinychenko , Hannah Petersen

We study photon production in the early stage of heavy-ion collisions using a multistage model combining IP-Glasma, K\o{}MP\o{}ST and relativistic hydrodynamics. We discuss the small momentum anisotropy of these photons, highlighting the…

核理论 · 物理学 2020-09-17 Charles Gale , Jean-François Paquet , Björn Schenke , Chun Shen

We analyze dilepton emission from hot and dense matter using a hybrid approach based on the Ultrarelativistic Quantum Molecular Dynamics (UrQMD) transport model with an intermediate hydrodynamic stage for the description of heavy-ion…

核理论 · 物理学 2011-08-08 E. Santini , J. Steinheimer , M. Bleicher , S. Schramm

We present transport calculations with the Ultra-relativistic Quantum Molecular Dynamics approach (UrQMD) for dilepton spectra at SIS energies. While we obtain a good agreement with experiment for elementary reactions, in heavy-ion…

核理论 · 物理学 2014-12-09 Stephan Endres , Hendrik van Hees , Janus Weil , Marcus Bleicher

We use QCD kinetic theory to compute photon production in the chemically equilibrating Quark-Gluon Plasma created in the early stages of high-energy heavy-ion collisions. We do a detailed comparison of pre-equilibrium photon rates to the…

高能物理 - 唯象学 · 物理学 2024-04-04 Oscar Garcia-Montero , Aleksas Mazeliauskas , Philip Plaschke , Sören Schlichting

The direct photon emission model in relativistic nuclear colliders has been improved in recent years for reducing the discrepancy between theoretical estimations and experimental data and for understanding the properties of the QCD matter.…

核理论 · 物理学 2020-06-24 Akihiko Monnai

The main focus of this article is to obtain various transport coefficients for a hot QCD medium that is produced while colliding two heavy nuclei ultra-relativistically. As the hot QCD medium follows dissipative hydrodynamics while…

核理论 · 物理学 2017-11-15 Sukanya Mitra , Vinod Chandra

When quarks hadronize, they accelerate. Because they carry electric charge, they must radiate light as they accelerate and hadronize. This is true not only in jets but also in heavy ion collisions, where a thermalized plasma of quarks and…

核理论 · 物理学 2016-11-02 Clint Young , Scott Pratt

We investigate the sensitivity of several observables to the density dependence of the symmetry potential within the microscopic transport model UrQMD (ultrarelativistic quantum molecular dynamics model). The same systems are used to probe…

核理论 · 物理学 2016-08-16 Qingfeng Li , Zhuxia Li , Sven Soff , Marcus Bleicher , Horst Stöcker

Dissipative processes in relativistic fluids are known to be important in the analyses of the hot QCD matter created in high-energy heavy-ion collisions. In this work, I consider dissipative corrections to energy and conserved charge…

核理论 · 物理学 2018-10-08 Akihiko Monnai

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…

核理论 · 物理学 2015-06-09 Iu. A. Karpenko , P. Huovinen , H. Petersen , M. Bleicher

Heavy-ion collision physics has entered the high precision era, demanding theoretical models capable of generating huge statistics to compare with experimental data. However, traditional hybrid models, which combine hydrodynamics and…

核理论 · 物理学 2025-10-28 Jing-An Sun , Li Yan , Charles Gale , Sangyong Jeon

We calculate the centrality dependence of direct photons produced in Au+Au collisions at sqrt{s}=200GeV and their transverse momentum spectra within the Parton-Hadron-String Dynamics (PHSD) transport approach. As sources for 'direct'…

核理论 · 物理学 2014-03-26 O. Linnyk , W. Cassing , E. Bratkovskaya