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Anisotropic flow plays a crucial role in establishing the equation of state of the Quark Gluon Plasma. The results at RHIC and LHC have demonstrated that the matter created in heavy-ion collisions behaves as a nearly perfect fluid reflected…

Nuclear Experiment · Physics 2019-08-13 Naghmeh Mohammadi

Event-by-event fluctuations in the initial density distributions of the fireballs created in relativistic heavy-ion collisions lead to event-by-event fluctuations of the final anisotropic flow angles, and density inhomogeneities in the…

Nuclear Theory · Physics 2013-05-01 Ulrich W. Heinz , Zhi Qiu , Chun Shen

We investigate the effect of hydrodynamic fluctuations on the rapidity decorrelations of anisotropic flow in high-energy nuclear collisions using a (3+1)-dimensional integrated dynamical model. The integrated dynamical model consists of…

Nuclear Theory · Physics 2020-12-30 Azumi Sakai , Koichi Murase , Tetsufumi Hirano

In this work, we study the charged hadron anisotropic flow coefficients $v_n$ (up to $n = 12$) using high-statistics event-by-event simulations of Pb+Pb collisions at $\sqrt{s_\mathrm{NN}} = 5.02$ and $5.36$~TeV, employing the IP-Glasma +…

Nuclear Theory · Physics 2025-09-23 Owen Horecny , Chun Shen

Within hydrodynamics we study the effects of the initial spatial anisotropy in non-central heavy-ion collisions on the momentum distributions of the emitted hadrons. We show that the elliptic flow measured at midrapidity in 158 A GeV/c…

Nuclear Theory · Physics 2009-10-09 Peter F. Kolb , Josef Sollfrank , Ulrich Heinz

In this work, we present a model-independent method to quantify the non-Gaussian fluctuations in the observable distributions, which are assessed by the difference between the measured observable distributions and reconstructed observable…

Nuclear Theory · Physics 2025-04-01 Xinyu Wang , Xiang Chen , Junping Yang , Ying Cui , Zhuxia Li , Kai Zhao , Yingxun Zhang

Anisotropic azimuthal correlations are used to probe the properties and the evolution of the system created in heavy-ion collisions. Two-particle azimuthal correlations were used in the searches of $p_{\rm T}$ dependent fluctuations of flow…

Nuclear Experiment · Physics 2015-03-26 You Zhou

The pseudorapidity dependence of elliptic ($v_2$), triangular ($v_3$), and quadrangular ($v_4$) flow coefficients of charged particles measured in Pb-Pb collisions at a centre-of-mass energy per nucleon pair of $\sqrt{s_{\rm NN}}=5.02$ TeV…

Nuclear Experiment · Physics 2024-04-15 ALICE Collaboration

A simple geometrical model with event-by-event fluctuations is suggested to study elliptical and triangular eccentricities in the initial state of relativistic heavy-ion collisions. This model describes rather well the ALICE and ATLAS data…

Nuclear Theory · Physics 2021-08-11 G. Kh. Eyyubova , V. L. Korotkikh , A. M. Snigirev , E. E. Zabrodin

Higher Fourier harmonics of anisotropic flow ($v_4$ and beyond) get large contributions induced by elliptic and triangular flow through nonlinear response. We present a general framework of nonlinear hydrodynamic response which encompasses…

Nuclear Theory · Physics 2018-05-16 Giuliano Giacalone , Li Yan , Jean-Yves Ollitrault

We present the generalization of recently introduced observables for the studies of correlated fluctuations of different anisotropic flow amplitudes, dubbed Symmetric Cumulants. We introduce a new set of higher order observables and outline…

Nuclear Experiment · Physics 2020-08-19 Cindy Mordasini , Ante Bilandzic , Deniz Karakoç , Seyed Farid Taghavi

We present measurements of the elliptic ($\mathrm{v}_2$), triangular ($\mathrm{v}_3$) and quadrangular ($\mathrm{v}_4$) anisotropic azimuthal flow over a wide range of pseudorapidities ($-3.5< \eta < 5$). The measurements are performed with…

Nuclear Experiment · Physics 2016-11-08 ALICE Collaboration

The ALICE Collaboration has recently measured the correlations between amplitudes of anisotropic flow in different Fourier harmonics, referred to as symmetric cumulants. We derive approximate relations between symmetric cumulants involving…

Nuclear Theory · Physics 2016-07-27 Giuliano Giacalone , Li Yan , Jacquelyn Noronha-Hostler , Jean-Yves Ollitrault

Flow coefficients v_n for n = 2, 3, 4, characterizing the anisotropic collective flow in Au+Au collisions at sqrt(s_NN) = 200 GeV, are measured relative to event planes \Psi_n determined at large rapidity. We report v_n as a function of…

Nuclear Experiment · Physics 2020-11-12 A. Adare , S. Afanasiev , C. Aidala , N. N. Ajitanand , Y. Akiba , H. Al-Bataineh , J. Alexander , K. Aoki , Y. Aramaki , E. T. Atomssa , R. Averbeck , T. C. Awes , B. Azmoun , V. Babintsev , M. Bai , G. Baksay , L. Baksay , K. N. Barish , B. Bassalleck , A. T. Basye , S. Bathe , V. Baublis , C. Baumann , A. Bazilevsky , S. Belikov , R. Belmont , R. Bennett , A. Berdnikov , Y. Berdnikov , A. A. Bickley , J. S. Bok , K. Boyle , M. L. Brooks , H. Buesching , V. Bumazhnov , G. Bunce , S. Butsyk , C. M. Camacho , S. Campbell , C. -H. Chen , C. Y. Chi , M. Chiu , I. J. Choi , R. K. Choudhury , P. Christiansen , T. Chujo , P. Chung , O. Chvala , V. Cianciolo , Z. Citron , B. A. Cole , M. Connors , P. Constantin , M. Csanád , T. Csörgő , T. Dahms , S. Dairaku , I. Danchev , K. Das , A. Datta , G. David , A. Denisov , A. Deshpande , E. J. Desmond , O. Dietzsch , A. Dion , M. Donadelli , O. Drapier , A. Drees , K. A. Drees , J. M. Durham , A. Durum , D. Dutta , S. Edwards , Y. V. Efremenko , F. Ellinghaus , T. Engelmore , A. Enokizono , H. En'yo , S. Esumi , B. Fadem , D. E. Fields , M. Finger , M. Finger, , F. Fleuret , S. L. Fokin , Z. Fraenkel , J. E. Frantz , A. Franz , A. D. Frawley , K. Fujiwara , Y. Fukao , T. Fusayasu , I. Garishvili , A. Glenn , H. Gong , M. Gonin , Y. Goto , R. Granier de Cassagnac , N. Grau , S. V. Greene , M. Grosse Perdekamp , T. Gunji , H. -Å. Gustafsson , J. S. Haggerty , K. I. Hahn , H. Hamagaki , J. Hamblen , R. Han , J. Hanks , E. P. Hartouni , E. Haslum , R. Hayano , X. He , M. Heffner , T. K. Hemmick , T. Hester , J. C. Hill , M. Hohlmann , W. Holzmann , K. Homma , B. Hong , T. Horaguchi , D. Hornback , S. Huang , T. Ichihara , R. Ichimiya , J. Ide , Y. Ikeda , K. Imai , M. Inaba , D. Isenhower , M. Ishihara , T. Isobe , M. Issah , A. Isupov , D. Ivanischev , B. V. Jacak , J. Jia , J. Jin , B. M. Johnson , K. S. Joo , D. Jouan , D. S. Jumper , F. Kajihara , S. Kametani , N. Kamihara , J. Kamin , J. H. Kang , J. Kapustinsky , K. Karatsu , D. Kawall , M. Kawashima , A. V. Kazantsev , T. Kempel , A. Khanzadeev , K. M. Kijima , B. I. Kim , D. H. Kim , D. J. Kim , E. Kim , E. J. Kim , S. H. Kim , Y. J. Kim , E. Kinney , K. Kiriluk , Á. Kiss , E. Kistenev , L. Kochenda , B. Komkov , M. Konno , J. Koster , D. Kotchetkov , A. Kozlov , A. Král , A. Kravitz , G. J. Kunde , K. Kurita , M. Kurosawa , Y. Kwon , G. S. Kyle , R. Lacey , Y. S. Lai , J. G. Lajoie , A. Lebedev , D. M. Lee , J. Lee , K. Lee , K. B. Lee , K. S. Lee , M. J. Leitch , M. A. L. Leite , E. Leitner , B. Lenzi , X. Li , P. Liebing , L. A. Linden Levy , T. Liška , A. Litvinenko , H. Liu , M. X. Liu , B. Love , R. Luechtenborg , D. Lynch , C. F. Maguire , Y. I. Makdisi , A. Malakhov , M. D. Malik , V. I. Manko , E. Mannel , Y. Mao , H. Masui , F. Matathias , M. McCumber , P. L. McGaughey , N. Means , B. Meredith , Y. Miake , A. C. Mignerey , P. Mikeš , K. Miki , A. Milov , M. Mishra , J. T. Mitchell , A. K. Mohanty , Y. Morino , A. Morreale , D. P. Morrison , T. V. Moukhanova , J. Murata , S. Nagamiya , J. L. Nagle , M. Naglis , M. I. Nagy , I. Nakagawa , Y. Nakamiya , T. Nakamura , K. Nakano , J. Newby , M. Nguyen , R. Nouicer , A. S. Nyanin , E. O'Brien , S. X. Oda , C. A. Ogilvie , M. Oka , K. Okada , Y. Onuki , A. Oskarsson , M. Ouchida , K. Ozawa , R. Pak , V. Pantuev , V. Papavassiliou , I. H. Park , J. Park , S. K. Park , W. J. Park , S. F. Pate , H. Pei , J. -C. Peng , H. Pereira , V. Peresedov , D. Yu. Peressounko , C. Pinkenburg , R. P. Pisani , M. Proissl , M. L. Purschke , A. K. Purwar , H. Qu , J. Rak , A. Rakotozafindrabe , I. Ravinovich , K. F. Read , K. Reygers , V. Riabov , Y. Riabov , E. Richardson , D. Roach , G. Roche , S. D. Rolnick , M. Rosati , C. A. Rosen , S. S. E. Rosendahl , P. Rosnet , P. Rukoyatkin , P. Ružička , B. Sahlmueller , N. Saito , T. Sakaguchi , K. Sakashita , V. Samsonov , S. Sano , T. Sato , S. Sawada , K. Sedgwick , J. Seele , R. Seidl , A. Yu. Semenov , R. Seto , D. Sharma , I. Shein , T. -A. Shibata , K. Shigaki , M. Shimomura , K. Shoji , P. Shukla , A. Sickles , C. L. Silva , D. Silvermyr , C. Silvestre , K. S. Sim , B. K. Singh , C. P. Singh , V. Singh , M. Slunečka , R. A. Soltz , W. E. Sondheim , S. P. Sorensen , I. V. Sourikova , N. A. Sparks , P. W. Stankus , E. Stenlund , S. P. Stoll , T. Sugitate , A. Sukhanov , J. Sziklai , E. M. Takagui , A. Taketani , R. Tanabe , Y. Tanaka , K. Tanida , M. J. Tannenbaum , S. Tarafdar , A. Taranenko , P. Tarján , H. Themann , T. L. Thomas , M. Togawa , A. Toia , L. Tomášek , H. Torii , R. S. Towell , I. Tserruya , Y. Tsuchimoto , C. Vale , H. Valle , H. W. van Hecke , E. Vazquez-Zambrano , A. Veicht , J. Velkovska , R. Vértesi , A. A. Vinogradov , M. Virius , V. Vrba , E. Vznuzdaev , X. R. Wang , D. Watanabe , K. Watanabe , Y. Watanabe , F. Wei , R. Wei , J. Wessels , S. N. White , D. Winter , J. P. Wood , C. L. Woody , R. M. Wright , M. Wysocki , W. Xie , Y. L. Yamaguchi , K. Yamaura , R. Yang , A. Yanovich , J. Ying , S. Yokkaichi , Z. You , G. R. Young , I. Younus , I. E. Yushmanov , W. A. Zajc , C. Zhang , S. Zhou , L. Zolin

We present a new method to extract anisotropic flow in heavy ion collisions from the genuine correlation among a large number of particles. Anisotropic flow is obtained from the zeroes in the complex plane of a generating function of…

Nuclear Theory · Physics 2009-11-10 R. S. Bhalerao , N. Borghini , J. -Y. Ollitrault

Particle azimuth distributions are widely studied in heavy-ion collisions. They are often expanded in Fourier series to extract anisotropic flow harmonics simultaneously. It was recently proposed that the different orders of flows could…

Nuclear Theory · Physics 2024-01-23 Yicheng Feng

In event by event hydrodynamic model, we have simulated 30-40\% Au+Au collisions at RHIC and computed the slope parameter from the invariant pion distribution. In each event, the slope parameter fluctuates azimuthally. Fourier expansion…

Nuclear Theory · Physics 2015-07-20 A. K. Chaudhuri

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

With A Multi-Phase Transport (AMPT) model we investigate the relation between the magnitude, fluctuations and correlations of the initial state spatial anisotropy $\varepsilon_{n}$ and the final state anisotropic flow coefficients $v_{n}$…

Nuclear Experiment · Physics 2016-03-23 You Zhou , Kai Xiao , Zhao Feng , Feng Liu , Raimond Snellings

We show that experimental data on cumulants of anisotropic flow in heavy-ion collisions probe the non-Gaussian statistics of the energy density field created right after the collision. We carry out a perturbative expansion of the initial…

Nuclear Theory · Physics 2019-08-07 Rajeev S. Bhalerao , Giuliano Giacalone , Jean-Yves Ollitrault