Title
Measurement of the elliptic anisotropy of charged particles produced in PbPb collisions <tex>$\sqrt{s_{NN}}=2.76$</tex> TeV Measurement of the elliptic anisotropy of charged particles produced in PbPb collisions <tex>$\sqrt{s_{NN}}=2.76$</tex> TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : C : nuclear physics. - Lancaster, Pa, 1970 - 2015
Volume/pages
87(2013) :1 , p. 1-34
ISSN
0556-2813
1089-490X
Article Reference
014902
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The anisotropy of the azimuthal distributions of charged particles produced in root s(NN) = 2.76 TeV PbPb collisions is studied with the CMS experiment at the LHC. The elliptic anisotropy parameter, upsilon(2), defined as the second coefficient in a Fourier expansion of the particle invariant yields, is extracted using the event-plane method, two- and four-particle cumulants, and Lee-Yang zeros. The anisotropy is presented as a function of transverse momentum (p(T)), pseudorapidity (eta) over a broad kinematic range, 0.3 < p(T) < 20 GeV/c, vertical bar eta vertical bar < 2.4, and in 12 classes of collision centrality from 0 to 80%. The results are compared to those obtained at lower center-of-mass energies, and various scaling behaviors are examined. When scaled by the geometric eccentricity of the collision zone, the elliptic anisotropy is found to obey a universal scaling with the transverse particle density for different collision systems and center-of-mass energies. DOI: 10.1103/PhysRevC.87.014902
Full text (open access)
https://repository.uantwerpen.be/docman/irua/c3cbcc/5058.pdf
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