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http://bura.brunel.ac.uk/handle/2438/15635
Title: | Azimuthal anisotropy of charged particles with transverse momentum up to 100 GeV/c in PbPb collisions at s<inf>NN</inf>=5.02 TeV |
Authors: | Tumasyan, A Adam, W Asilar, E Bergauer, T Brandstetter, J Brondolin, E Dragicevic, M Erö, J Flechl, M Friedl, M Frühwirth, R Ghete, VM Hartl, C Hörmann, N Hrubec, J Jeitler, M König, A Krätschmer, I Liko, D Matsushita, T Mikulec, I Rabady, D Rad, N Rahbaran, B Rohringer, H Schieck, J Strauss, J Waltenberger, W Wulz, CE Dvornikov, O Makarenko, V Mossolov, V Suarez Gonzalez, J Zykunov, V Shumeiko, N Alderweireldt, S De Wolf, EA Janssen, X Lauwers, J Van De Klundert, M Van Haevermaet, H Van Mechelen, P Van Remortel, N Van Spilbeeck, A Abu Zeid, S Blekman, F D'Hondt, J Daci, N De Bruyn, I Deroover, K Lowette, S Moortgat, S Moreels, L Olbrechts, A Python, Q Skovpen, K Tavernier, S Van Doninck, W Van Mulders, P Van Parijs, I Brun, H Clerbaux, B De Lentdecker, G Delannoy, H Fasanella, G Favart, L Goldouzian, R Grebenyuk, A Karapostoli, G Lenzi, T Léonard, A Luetic, J Maerschalk, T Marinov, A Randle-conde, A Seva, T Vander Velde, C Vanlaer, P Vannerom, D Yonamine, R Zenoni, F Zhang, F Cimmino, A Cornelis, T Dobur, D Fagot, A Gul, M Khvastunov, I Poyraz, D Salva, S Schöfbeck, R Tytgat, M Van Driessche, W Yazgan, E Zaganidis, N Bakhshiansohi, H Beluffi, C |
Citation: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2018, 776 pp. 195 - 216 |
Abstract: | © 2017 The Author The Fourier coefficients v 2 and v 3 characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at s NN =5.02 TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, 1 < p T < 100 GeV/c. The analysis focuses on the p T > 10 GeV/c range, where anisotropic azimuthal distributions should reflect the path-length dependence of parton energy loss in the created medium. Results are presented in several bins of PbPb collision centrality, spanning the 60% most central events. The v 2 coefficient is measured with the scalar product and the multiparticle cumulant methods, which have different sensitivities to initial-state fluctuations. The values from both methods remain positive up to p T ∼60–80 GeV/c, in all examined centrality classes. The v 3 coefficient, only measured with the scalar product method, tends to zero for p T ≳20 GeV/c. Comparisons between theoretical calculations and data provide new constraints on the path-length dependence of parton energy loss in heavy ion collisions and highlight the importance of the initial-state fluctuations. |
URI: | http://bura.brunel.ac.uk/handle/2438/15635 |
DOI: | http://dx.doi.org/10.1016/j.physletb.2017.11.041 |
ISSN: | 0370-2693 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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