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We consider the dependence of collective flow on the nuclear surface thickness in a Boltzmann--Uehling--Uhlenbeck transport model of heavy ion collisions. Well defined surfaces are introduced by giving test particles a Gaussian density…

Nuclear Theory · Physics 2008-11-26 D. Klakow , G. Welke , W. Bauer

Anisotropic flow of hadronic matter is considered as a sensitive tool to detect the early stage dynamics of high-energy heavy-ion collisions. Taking the event by event fluctuations of the collision geometry into account, the elliptic flow…

Nuclear Theory · Physics 2018-04-17 Soumya Sarkar , Provash Mali , Amitabha Mukhopadhyay

We calculate eccentricities in high energy proton-nucleus collisions, by calculating correlation functions of the energy density field of the Glasma immediately after the collision event at proper time tau = 0. We separately consider the…

High Energy Physics - Phenomenology · Physics 2021-05-26 S. Demirci , T. Lappi , S. Schlichting

Higher-order anisotropic flows in heavy-ion collisions are affected by nonlinear mode coupling effects. It has been suggested that the associated nonlinear hydrodynamic response coefficients probe the transport properties and are largely…

Nuclear Theory · Physics 2016-06-22 Jing Qian , Ulrich W. Heinz , Jia Liu

We explore the influence of a temperature-dependent shear viscosity over entropy density ratio $\eta/s$ on the azimuthal anisotropies v_2 and v_4 of hadrons at various rapidities. We find that in Au+Au collisions at full RHIC energy,…

Nuclear Theory · Physics 2014-11-13 Etele Molnar , Hannu Holopainen , Pasi Huovinen , Harri Niemi

In ultrarelativistic heavy-ion collisions, the Fourier decomposition of the relative azimuthal angle, \Delta \phi, distribution of particle pairs yields a large cos(3\Delta \phi) component, extending out to large rapidity separations \Delta…

Nuclear Theory · Physics 2010-10-06 Burak Han Alver , Clement Gombeaud , Matthew Luzum , Jean-Yves Ollitrault

ATLAS measurements of the azimuthal anisotropy in lead-lead collisions at $\sqrt{s_{NN}}=2.76$ TeV are shown using a dataset of approximately 7 $\mu$b$^{-1}$ collected at the LHC in 2010. The measurements are performed for charged particles…

High Energy Physics - Experiment · Physics 2014-12-23 ATLAS Collaboration

Within the framework of a multi-phase transport model, harmonic flows $v_n$ (n = 2, 3 and 4) are investigated for Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV and Pb + Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV. The event-by-event…

Nuclear Theory · Physics 2014-04-29 L. X. Han , G. L. Ma , Y. G. Ma , X. Z. Cai , J. H. Chen , S. Zhang , C. Zhong

Using the coalescence model based on nucleons from a blast-wave model with its parameters fitted to the measured proton transverse momentum spectrum and elliptic flow in heavy ion collisions at the Relativistic Heavy Ion Collider, we study…

Nuclear Theory · Physics 2017-06-07 Xuejiao Yin , Che Ming Ko , Yifeng Sun , Lilin Zhu

We calculate, for the first time, $J/\psi$ triangular flow in high energy nuclear collisions. The charmonium motion in medium is controlled by a transport equation with loss and gain terms, and the evolution of the hot medium is governed by…

High Energy Physics - Phenomenology · Physics 2022-03-14 Jiaxing Zhao , Baoyi Chen , Pengfei Zhuang

Decorrelation of the elliptic flow in rapidity is calculated within a hybrid approach which includes event-by-event viscous fluid dynamics and final state hadronic cascade model. The simulations are performed for Au+Au collisions at…

Nuclear Theory · Physics 2021-08-04 Jakub Cimerman , Iurii Karpenko , Boris Tomášik , Barbara Antonina Trzeciak

Azimuthal anisotropy is a key observation made in ultrarelativistic heavy-ion collisions. This phenomenon has played a crucial role in the development of the field over the last two decades. In addition to its interest for studying the…

Nuclear Experiment · Physics 2023-10-20 Jean-Yves Ollitrault

We simulate ultra-central collisions of prolate uranium-uranium nuclei at intermediate energies using the isospin-dependent Boltzmann-Uehling-Uhlenbeck model to investigate the impact of momentum anisotropy on spatial geometric effects. By…

Nuclear Theory · Physics 2024-11-28 Xiao-Hua Fan , Zu-Xing Yang , Peng-Hui Chen , Zhi-Pan Li , Wei Zuo , Masaaki Kimura , Shunji Nishimura

Measurements of elliptic ($v_2$) and triangular ($v_3$) flow coefficients of $\pi^{\pm}$, K$^{\pm}$, p+$\rm \overline{p}$, K$^0_{\rm S}$, and $\Lambda + \overline{\Lambda}$ obtained with the scalar product method in Xe-Xe collisions at…

Nuclear Experiment · Physics 2022-01-14 ALICE Collaboration

Recent developments in the field of anisotropic flow in nuclear collision are reviewed. The results from the top AGS energy to the top RHIC energy are discussed with emphasis on techniques, interpretation, and uncertainties in the…

Nuclear Experiment · Physics 2008-11-01 Sergei A. Voloshin , Arthur M. Poskanzer , Raimond Snellings

A study of elliptical flow is presented with respect to the asymmetry of colliding nuclei using the reactions of 24Cr50 +44 Ru102, 16S32 +50 Sn120 and 8O16 +54 Xe136 at incident energies between 50 and 250 MeV/nucleon within the framework…

Nuclear Theory · Physics 2011-03-07 Varinderjit Kaur , Suneel Kumar , Rajeev K. Puri

The cumulants of the distribution of anisotropic flow are measured accurately in Pb+Pb collisions at the LHC as a function of centrality classifiers (charged multiplicity and/or transverse energy). Using Bayesian inference, we reconstruct…

Nuclear Theory · Physics 2025-07-01 Enak Roubertie , Mathis Verdan , Andreas Kirchner , Jean-Yves Ollitrault

Measurements of anisotropic flow coefficients ($v_n$) and their cross-correlations using two- and multi-particle cumulant methods are reported in collisions of pp at $\sqrt{s} = 13$ TeV, p-Pb at $\sqrt{s_{_{\rm NN}}} = 5.02$ TeV, Xe-Xe at…

Nuclear Experiment · Physics 2019-11-11 ALICE Collaboration

Using the coalescence model with nucleon phase-space distributions generated by the hybrid MUSIC framework, we study the elliptic flow ($v_2$) and triangular flow ($v_3$) of (anti-)protons, (anti-)deuterons, (anti-)$^3\mathrm{He}$, and…

Nuclear Theory · Physics 2026-04-07 Fu Ma , Zheng-Qing Wang , Xiong-Hong He , Che Ming Ko , Qi-Ye Shou , Kai-Jia Sun , Wenbin Zhao , Wen-Hao Zhou

We study elliptic and triangular flow in the collisions of deuteron-gold nuclei at $\sqrt{s_{\rm NN}} = 200$ GeV at RHIC and of proton-lead nuclei at $\sqrt{s_{\rm NN}} = 5.02$ TeV at the LHC, utilizing (3+1)-dimensional ideal hydrodynamics…

Nuclear Theory · Physics 2014-04-23 Guang-You Qin , Berndt Müller