Measurement of the elliptic anisotropy of charged particles produced in PbPb collisions at √sNN=2.76 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
07/01/2013
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Resumo |
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, v2, 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 (pT), pseudorapidity (η) over a broad kinematic range, 0.3<pT<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. © 2013 CERN. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
Identificador |
http://dx.doi.org/10.1103/PhysRevC.87.014902 Physical Review C - Nuclear Physics, v. 87, n. 1, 2013. 0556-2813 1089-490X http://hdl.handle.net/11449/74351 10.1103/PhysRevC.87.014902 WOS:000313159400007 2-s2.0-84872736459 2-s2.0-84872736459.pdf |
Idioma(s) |
eng |
Relação |
Physical Review C: Nuclear Physics |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |