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Verlagsausgabe
DOI: 10.5445/IR/1000078649
Veröffentlicht am 10.01.2018
Originalveröffentlichung
DOI: 10.1016/j.physletb.2017.11.041
Scopus
Zitationen: 5
Web of Science
Zitationen: 12

Azimuthal anisotropy of charged particles with transverse momentum up to 100 GeV/ c in PbPb collisions at √SNN = 5.02TeV

CMS Collaboration; 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.; ... mehr

Abstract:
The Fourier coefficients v2and v3characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at √sNN=5.02TeVare measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, 1 <pT<100GeV/c. The analysis focuses on the pT>10GeV/crange, 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 v2coefficient 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∼60–80GeV/c, in all examined centrality classes. The v3coefficient, only measured with the scalar product method, tends to zero for pT 20GeV/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.


Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 0370-2693, 1873-2445
URN: urn:nbn:de:swb:90-786490
KITopen ID: 1000078649
Erschienen in Physics letters / B
Band 776
Seiten 195–216
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Schlagworte CMS; QGP; High-pT; Flow; Parton energy loss; Jet quenching
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