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Measurement of higher-order harmonic azimuthal anisotropy in PbPb collisions at √s[subscript NN] = 2.76 TeV

Author(s)
Apyan, Aram; Bauer, Gerry P.; Busza, Wit; Cali, Ivan Amos; Chan, M.; Di Matteo, Leonardo; Dutta, V.; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Gulhan, Doga Can; Klute, Markus; Lai, Yue Shi; Levin, A.; Luckey, P. David, Jr.; Ma, Teng; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E.; Roland, Gunther M.; Stephans, George S. F.; Stockli, Fabian; Sumorok, Konstanty C.; Velicanu, Dragos Alexandru; Veverka, Jan; Wyslouch, Boleslaw; Yang, M.; Yoon, A. S.; Zanetti, Marco; Zhukova, Victoria; ... Show more Show less
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Abstract
Measurements are presented by the CMS Collaboration at the Large Hadron Collider (LHC) of the higher-order harmonic coefficients that describe the azimuthal anisotropy of charged particles emitted in √s[subscript NN] = 2.76 TeV PbPb collisions. Expressed in terms of the Fourier components of the azimuthal distribution, the n = 3–6 harmonic coefficients are presented for charged particles as a function of their transverse momentum (0.3 < p[subscript T] <8.0GeV/c), collision centrality (0%–70%), and pseudorapidity (|η| < 2.0). The data are analyzed using the event plane, multiparticle cumulant, and Lee-Yang zeros methods, which provide different sensitivities to initial-state fluctuations. Taken together with earlier LHC measurements of elliptic flow (n = 2), the results on higher-order harmonic coefficients develop a more complete picture of the collective motion in high-energy heavy-ion collisions and shed light on the properties of the produced medium.
Date issued
2014-04
URI
http://hdl.handle.net/1721.1/88935
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of Science
Journal
Physical Review C
Publisher
American Physical Society
Citation
Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Measurement of Higher-Order Harmonic Azimuthal Anisotropy in PbPb Collisions at √s[subscript NN] = 2.76 TeV.” Phys. Rev. C 89, no. 4 (April 2014). © 2014 CERN, for the CMS Collaboration
Version: Final published version
ISSN
0556-2813
1089-490X

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