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Collective flow, its anisotropies and its event-to-event fluctuations in relativistic heavy-ion collisions, and the extraction of the specific shear viscosity of quark-gluon plasma (QGP) from collective flow data collected in heavy-ion…

Nuclear Theory · Physics 2013-08-05 Ulrich W Heinz , Raimond Snellings

The elliptic flow of neutrons, protons and light complex particles in reactions of neutron-rich systems at relativistic energies is proposed as an observable sensitive to the strength of the symmetry term in the equation of state at…

Nuclear Experiment · Physics 2009-07-17 W. Trautmann , M. Chartier , Y. Leifels , R. C. Lemmon , Q. Li , J. Lukasik , A. Pagano , P. Pawlowski , P. Russotto , P. Z. Wu

This contribution presents a theoretical overview of hydrodynamic modelling of heavy-ion collisions, with highlights on some recent developments. In particular, the formulation of anisotropic hydrodynamics, the role of hydrodynamic…

Nuclear Theory · Physics 2018-03-14 Li Yan

A recently developed framework of highly-anisotropic and strongly-dissipative hydrodynamics -- ADHYDRO -- has been introduced and used to analyze the space-time evolution of matter produced in ultra-relativistic heavy-ion collisions. The…

Nuclear Theory · Physics 2012-07-04 Radoslaw Ryblewski

Hadron resonance gas models provide a good description of the equation of state of quantum chromodynamics determined by lattice QCD calculations at temperatures $T \sim 100-155$ MeV. In this paper we investigate the effects of an…

We summarize some recent ideas relating to anisotropic particle production in high-energy collisions. Anisotropic gluon distributions lead to anisotropies of the single-particle azimuthal distribution and hence to disconnected contributions…

High Energy Physics - Phenomenology · Physics 2015-03-16 Adrian Dumitru , Andre V. Giannini , Vladimir Skokov

Correlation measurements imply that anisotropic flow in nuclear collisions includes a novel triangular component along with the more familiar elliptic-flow contribution. Triangular flow has been attributed to event-wise fluctuations in the…

Nuclear Theory · Physics 2013-05-30 Sean Gavin , George Moschelli

The connection between initial-state geometry and anisotropic flow can be quantified through a well-established mapping between $p_T$-integrated flow harmonics and cumulants of the initial transverse energy distribution. In this paper we…

The surprising manifestation of collectivity in small collision systems, such as nucleon-nucleon and nucleon-nucleus collisions, is perhaps even more striking when discussed at higher momenta. In larger systems, high-$p_T$ elliptic…

High Energy Physics - Phenomenology · Physics 2026-03-16 Erik Carrió , Daniel Pablos

Anisotropic flow is accredited to have effects from the initial state geometry and fluctuations in the nuclear overlap region. The elliptic flow ($v_2$) and triangular flow ($v_3$) coefficients of the final state particles are expected to…

High Energy Physics - Phenomenology · Physics 2023-04-13 Suraj Prasad , Neelkamal Mallick , Sushanta Tripathy , Raghunath Sahoo

We have investigated the build up of anisotropic flows within a parton cascade approach at fixed shear viscosity to entropy density \eta/s to study the generation of collective flows in ultra-relativistic heavy ion collisions. We present a…

High Energy Physics - Phenomenology · Physics 2015-05-30 S. Plumari , V. Greco

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 common interpretation of elliptic flow $v_2$ in heavy ion collisions is that it is produced by hydrodynamic flow at low transverse momentum and by parton energy loss at high transverse momentum. Here, we discuss this interpretation in…

Nuclear Theory · Physics 2016-09-21 Giorgio Torrieri

We compute the momentum diffusion coefficients of heavy quarks, $\kappa_\parallel$ and $\kappa_\perp$, in a strong magnetic field $B$ along the directions parallel and perpendicular to $B$, respectively, at the leading order in QCD coupling…

High Energy Physics - Phenomenology · Physics 2016-04-21 Kenji Fukushima , Koichi Hattori , Ho-Ung Yee , Yi Yin

To reduce the effect of the fluctuations of initial geometrical shape, elliptic flow are studied at fixed centrality in Au+Au collision at $\sqrt{s_{\rm NN}}$=200GeV. It is observed with the participant increasing, elliptic flow has an…

Nuclear Theory · Physics 2012-08-31 Wang Meijuan , Chen Gang , Wu Yuanfang

Heavy-ion experiments have recently revealed that azimuthal momentum anisotropy -- elliptic flow -- of direct photons from a QCD medium is a few times larger than hydrodynamic predictions. I present a possible explanation for the…

Nuclear Theory · Physics 2014-11-03 Akihiko Monnai

Suppression of jet spectra or jet quenching in high-energy heavy-ion collisions is caused by jet energy loss in the dense medium. The azimuthal anisotropy of jet energy loss in non-central heavy-ion collisions can lead to jet anisotropy…

High Energy Physics - Phenomenology · Physics 2022-01-24 Yayun He , Wei Chen , Tan Luo , Shanshan Cao , Long-Gang Pang , Xin-Nian Wang

Higher-order anisotropic flows $v_{4}$ and $v_{6}$ in heavy ion collisions at the Relativistic Heavy Ion Collider are studied in a multiphase transport model that has previously been used successfully for describing the elliptic flow $v_2$…

Nuclear Theory · Physics 2009-11-10 Lie-Wen Chen , C. M. Ko , Zi-Wei Lin

We perform a systematic study on the decorrelation of anisotropic flows along the pseudorapidity in relativistic heavy-ion collisions at the LHC and RHIC energies. The dynamical evolution of the QGP fireball is simulated via the CLVisc…

Nuclear Theory · Physics 2018-08-29 Xiang-Yu Wu , Long-Gang Pang , Guang-You Qin , Xin-Nian Wang

The elliptic flow for $Z\le2$ particles in heavy ion collisions at energies from several tens to several hundreds MeV per nucleon is investigated by means of transport model,i.e. a new version of the Improved Quantum Molecular Dynamics…

Nuclear Theory · Physics 2009-11-11 Yingxun Zhang , Zhuxia Li