Abstract
Worldwide LHC Computing Grid (WLCG) Collaboration
State Committee of Science
World Federation of Scientists (WFS)
Swiss Fonds Kidagan, Armenia
Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
Financiadora de Estudos e Projetos (FINEP)
Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
Ministry of Science and Technology of China (MSTC)
National Natural Science Foundation of China (NSFC)
Ministry of Education of China (MOEC)
Ministry of Science, Education and Sports of Croatia and Unity through Knowledge Fund, Croatia
Ministry of Education and Youth of the Czech Republic
Danish Natural Science Research Council
Carlsberg Foundation
Danish National Research Foundation
European Research Council under the European Community's Seventh Framework Programme
Helsinki Institute of Physics and the Academy of Finland
French Centre national de la recherche scientifique-Institut national de physique nucleaire et de physique des particules [CNRS-IN2P3]
Region Pays de Loire
Region Alsace
Region Auvergne
CEA, France
German Bundesministerium fur Bildung
Wissenschaft, Forschung und Technologie (BMBF)
Helmholtz Association
General Secretariat for Research and Technology
Ministry of Development, Greece
National Research, Development and Innovation Office (NKFIH), Hungary
Council of Scientific and Industrial Research (CSIR), New Delhi
Department of Atomic Energy and Department of Science and Technology of the Government of India
Istituto Nazionale di Fisica Nucleare (INFN)
Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi," Italy
Japan Society for the Promotion of Science (JSPS) KAKENHI and MEXT, Japan
National Research Foundation of Korea (NRF)
Consejo Nacional de Cienca y Tecnologia (CONACYT)
Direccion General de Asuntos del Personal Academico (DGAPA), Mexico
Amerique Latine Formation academique-European Commission (ALFA-EC)
EPLANET Program (European Particle Physics Latin American Network)
Stichting voor Fundamenteel Onderzoek der Materie (FOM)
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands
Research Council of Norway (NFR)
Pontificia Universidad Catolica del Peru
National Science Centre, Poland
Ministry of National Education/Institute for Atomic Physics and National Council of Scientific Research in Higher Education (CNCSI-UEFISCDI), Romania
Joint Institute for Nuclear Research, Dubna
Ministry of Education and Science of Russian Federation
Russian Academy of Sciences
Russian Federal Agency of Atomic Energy
Russian Federal Agency for Science and Innovations
Russian Foundation for Basic Research
Ministry of Education of Slovakia
Department of Science and Technology, South Africa
Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (CIEMAT)
E-Infrastructure shared between Europe
Latin America (EELA)
Ministerio de Economia y Competitividad (MINECO) of Spain
Xunta de Galicia (Conselleria de Educacion)
Centro de Aplicaciones Tecnologicas y Desarrollo Nuclear (CEADEN), Cubaenergia, Cuba
IAEA (International Atomic Energy Agency)
Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW)
National Science and Technology Development Agency (NSDTA)
Suranaree University of Technology (SUT)
Office of the Higher Education Commission under NRU project of Thailand
Ukraine Ministry of Education and Science
United Kingdom Science and Technology Facilities Council (STFC)
United States Department of Energy
United States National Science Foundation
State of Texas
State of Ohio
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We report the measurements of correlations between event-by-event fluctuations of amplitudes of anisotropic flow harmonics in nucleus-nucleus collisions, obtained for the first time using a new analysis method based on multiparticle cumulants in mixed harmonics. This novel method is robust against systematic biases originating from nonflow effects and by construction any dependence on symmetry planes is eliminated. We demonstrate that correlations of flow harmonics exhibit a better sensitivity to medium properties than the individual flow harmonics. The new measurements are performed in Pb-Pb collisions at the center-of-mass energy per nucleon pair of root S-NN = 2.76 TeV by the ALICE experiment at the Large Hadron Collider. The centrality dependence of correlation between event-by-event fluctuations of the elliptic upsilon 2 and quadrangular upsilon 4 flow harmonics, as well as of anticorrelation between upsilon 2 and triangular upsilon 3 flow harmonics are presented. The results cover two different regimes of the initial state configurations: geometry dominated (in midcentral collisions) and fluctuation dominated (in the most central collisions). Comparisons are made to predictions from Monte Carlo Glauber, viscous hydrodynamics, AMPT, and HIJING models. Together with the existing measurements of the individual flow harmonics the presented results provide further constraints on the initial conditions and the transport properties of the system produced in heavy-ion collisions.
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Conselho Nacional de Desenvolvimento CientÃfico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)