Measurement of the elliptic anisotropy of charged particles produced in PbPb collisions at √(s)NN=2.76 TeV

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Issue Date
2013-01-07Author
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Grachov, Oleg A.
Kenny, R. P., III
Murray, Michael J.
Noonan, Danny
Radicci, Valeria
Sanders, Stephen J.
Tinti, Gemma
Wood, Jeffrey Scott
Zhukova, Victoria
Chatrchyan, S.
Khachatryan, V.
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
Erö, J.
Publisher
American Physical Society
Type
Article
Article Version
Scholarly/refereed, publisher version
Metadata
Show full item recordAbstract
The anisotropy of the azimuthal distributions of charged particles produced in √sNN=2.76 TeV PbPb collisions is studied with the CMS experiment at the LHC. The elliptic anisotropy parameter, v(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 (η) over a broad kinematic range, 0.3<p(T)<20 GeV/c, |η|<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.
Description
This is the publisher's version, also available electronically from http://journals.aps.org/prc/abstract/10.1103/PhysRevC.87.014902.
ISSN
0556-2813Collections
Citation
Chatrchyan, S. et al. (CMS Collaboration). (2013). "Measurement of the elliptic anisotropy of charged particles produced in PbPb collisions at √(s)NN=2.76 TeV." Physical Review C, 87(1):014802. http://www.dx.doi.org/10.1103/PhysRevC.87.014902.
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