Measurement of the elliptic anisotropy of charged particles produced in PbPb collisions at √sNN=2.76 TeV
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Description
Abstract
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.
Description
Advisor
Degree
Type
Keywords
Citation
CMS Collaboration. "Measurement of the elliptic anisotropy of charged particles produced in PbPb collisions at √sNN=2.76 TeV." Physical Review C, 87, (2013) American Physical Society: 14902. http://dx.doi.org/10.1103/PhysRevC.87.014902.