Title
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Measurement of the elliptic anisotropy of charged particles produced in PbPb collisions TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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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 |
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Language
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English
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Source (journal)
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Physical review : C : nuclear physics. - Lancaster, Pa, 1970 - 2015
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Publication
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Lancaster, Pa
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2013
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ISSN
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0556-2813
[print]
1089-490X
[online]
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DOI
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10.1103/PHYSREVC.87.014902
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Volume/pages
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87
:1
(2013)
, p. 1-34
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Article Reference
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014902
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ISI
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000313159400007
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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