@misc{10481/62979,
year = {2013},
month = {11},
url = {http://hdl.handle.net/10481/62979},
abstract = {The distributions of event-by-event harmonic flow coefficients v n for n = 2- 4 are measured in sNN−−−−√ = 2.76 TeV Pb + Pb collisions using the ATLAS detector at the LHC. The measurements are performed using charged particles with transverse momentum p T > 0.5 GeV and in the pseudorapidity range |η| < 2.5 in a dataset of approximately 7 μb−1 recorded in 2010. The shapes of the v n distributions suggest that the associated flow vectors are described by a two-dimensional Gaussian function in central collisions for v 2 and over most of the measured centrality range for v 3 and v 4. Significant deviations from this function are observed for v 2 in mid-central and peripheral collisions, and a small deviation is observed for v 3 in mid-central collisions. In order to be sensitive to these deviations, it is shown that the commonly used multi-particle cumulants, involving four particles or more, need to be measured with a precision better than a few percent. The v n distributions are also measured independently for charged particles with 0.5 < p T < 1 GeV and p T > 1 GeV. When these distributions are rescaled to the same mean values, the adjusted shapes are found to be nearly the same for these two p T ranges. The v n distributions are compared with the eccentricity distributions from two models for the initial collision geometry: a Glauber model and a model that includes corrections to the initial geometry due to gluon saturation effects. Both models fail to describe the experimental data consistently over most of the measured centrality range.},
organization = {ANPCyT},
organization = {YerPhI, Armenia},
organization = {Australian Research Council},
organization = {BMWF},
organization = {Austrian Science Fund (FWF)},
organization = {Azerbaijan National Academy of Sciences (ANAS)},
organization = {SSTC, Belarus},
organization = {National Council for Scientific and Technological Development (CNPq)},
organization = {Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)},
organization = {Natural Sciences and Engineering Research Council of Canada},
organization = {National Research Centre (NRC)},
organization = {Canada Foundation for Innovation},
organization = {CERN},
organization = {Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)},
organization = {Chinese Academy of Sciences},
organization = {MOST},
organization = {National Natural Science Foundation of China},
organization = {Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias},
organization = {Ministry of Education, Youth & Sports - Czech Republic},
organization = {MPO CR},
organization = {VSC CR},
organization = {Czech Republic Government},
organization = {DNRF},
organization = {Danish Natural Science Research Council},
organization = {Lundbeckfonden},
organization = {EPLANET},
organization = {European Research Council (ERC)},
organization = {NSRF},
organization = {European Union (EU)},
organization = {Centre National de la Recherche Scientifique (CNRS)},
organization = {CEA-DSM/IRFU, France},
organization = {GNSF, Georgia},
organization = {Federal Ministry of Education & Research (BMBF)},
organization = {German Research Foundation (DFG)},
organization = {HGF},
organization = {Max Planck Society},
organization = {Alexander von Humboldt Foundation},
organization = {Greek Ministry of Development-GSRT},
organization = {NSRF, Greece},
organization = {Israel Science Foundation},
organization = {MINERVA},
organization = {German-Israeli Foundation for Scientific Research and Development},
organization = {DIP},
organization = {Benoziyo Center, Israel},
organization = {Istituto Nazionale di Fisica Nucleare (INFN)},
organization = {Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)

Japan Society for the Promotion of Science},
organization = {CNRST, Morocco},
organization = {FOM (The Netherlands)},
organization = {Netherlands Organization for Scientific Research (NWO)

Netherlands Government},
organization = {BRF},
organization = {RCN, Norway},
organization = {Ministry of Science and Higher Education, Poland},
organization = {GRICES},
organization = {Portuguese Foundation for Science and Technology},
organization = {MERYS (MECTS), Romania},
organization = {MES of Russia},
organization = {Russian Federation},
organization = {JINR},
organization = {MSTD, Serbia},
organization = {MSSR, Slovakia},
organization = {Slovenian Research Agency - Slovenia},
organization = {MIZS, Slovenia},
organization = {DST/NRF, South Africa},
organization = {Spanish Government},
organization = {SRC},
organization = {Wallenberg Foundation, Sweden},
organization = {SER},
organization = {Swiss National Science Foundation (SNSF)},
organization = {Cantons of Bern and Geneva, Switzerland},
organization = {National Science Council of Taiwan},
organization = {Ministry of Energy & Natural Resources - Turkey},
organization = {Royal Society and Leverhulme Trust, United Kingdom},
organization = {United States Department of Energy (DOE)},
organization = {National Science Foundation (NSF)},
organization = {Science & Technology Facilities Council (STFC)
	
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organization = {ICREA},
publisher = {Springer Nature},
keywords = {Heavy ion collisions},
keywords = {Harmonic flow},
keywords = {Event-by-event fluctuation},
keywords = {Unfolding},
keywords = {Hadron-Hadron scattering},
title = {Measurement of the distributions of event-by-event flow harmonics in lead-lead collisions at √sNN = 2.76 TeV with the ATLAS detector at the LHC},
doi = {10.1007/JHEP11(2013)183},
author = {Aad, G. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration},
}