Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at \sqrt(s_NN)=2.76 TeV

Submission Date: 
28/05/2012
Article Information
Submission Form
System: 
Pb-Pb
Energy: 
2.76 TeV
Abstract Plain Text: 

The elliptic, v2, triangular, v3, and quadrangular, v4, flow coefficients are measured for unidentified charged particles, pions and (anti-)protons in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV with the ALICE detector at the Large Hadron Collider. Results obtained with the event plane and four-particle correlation methods are reported for the pseudo-rapidity range |eta|<0.8 at different collision centralities and as a function of transverse momentum, pt, out to pt=20 GeV/c. The observed non-zero elliptic and triangular flow depends only weakly on transverse momentum for pt>8 GeV/c. The small pt dependence of the difference between elliptic flow results obtained from two- and four-particle cumulant methods suggests a common origin of flow fluctuations up to pt=8 GeV/c. The magnitude of the (anti-)proton elliptic and triangular flow is larger than that of pions out to at least pt=8 GeV/c indicating that the particle type dependence persists out to high pt.
 

Public note for supplemental figure at https://cds.cern.ch/record/2045885