Anisotropic flow in sqrt(s)=2.76 TeV Pb+Pb collisions at the LHC
arXiv:1102.0575 · doi:10.1016/j.physletb.2011.06.065
Abstract
The results on elliptic flow in sqrt(s)=2.76 TeV Pb+Pb collisions at the Large Hadron Collider (LHC) reported by the ALICE collaboration are remarkably similar to those for sqrt(s)=200 GeV gold-gold collisions at the Relativistic Heavy Ion Collider (RHIC). This result is surprising, given the expected longer lifetime of the system at the higher collision energies. We show that it is nevertheless consistent with 3+1 dimensional viscous event-by-event hydrodynamic calculations, and demonstrate that elliptic flow at both RHIC and LHC is built up mostly within the first 5 fm/c of the evolution. We conclude that an "almost perfect liquid" is produced in heavy-ion collisions at the LHC. Furthermore, we present predictions for triangular flow as a function of transverse momentum for different centralities.
5 pages, 9 figures, one figure replaced; includes event-by-event computations with increased statistics and resolution and more accurate matching to experimental spectra; comments on different v_2 measurement methods added; calculation of the integrated v_2 added
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