Bibcode
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; 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, C.-E.; Dvornikov, O.; Makarenko, V.; Mossolov, V.; Suarez Gonzalez, J.; Zykunov, V.; Shumeiko, N.; Alderweireldt, S.; De Wolf, E. A.; 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.; Bondu, O.; Brochet, S. et al.
Bibliographical reference
Physics Letters B, Volume 776, p. 195-216.
Advertised on:
1
2018
Citations
51
Refereed citations
47
Description
The Fourier coefficients v2 and v3 characterizing
the anisotropy of the azimuthal distribution of charged particles
produced in PbPb collisions at √{sNN } = 5.02 TeV are
measured with data collected by the CMS experiment. The measurements
cover a broad transverse momentum range, 1 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 v2 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 pT ∼ 60-
80 GeV / c, in all examined centrality classes. The v3
coefficient, only measured with the scalar product method, tends to zero
for pT ≳ 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.