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

Lee Stuart Barnby, David Evans, Luke Hanratty, Peter Jones, Anton Jusko, Ravjeet Kour, Marian Krivda, Cristina Lazzeroni, Graham Lee, Roman Lietava, Zoe Matthews, Sparsh Navin, Plamen Petrov, Arvinder Palaha, Patrick Scott, Orlando Villalobos Baillie

Research output: Contribution to journalArticlepeer-review

136 Citations (Scopus)

Abstract

The elliptic, v2, triangular, v3, and quadrangular, v4, azimuthal anisotropic flow coefficients are measured for unidentified charged particles, pions, and (anti-)protons in Pb–Pb collisions at with the ALICE detector at the Large Hadron Collider. Results obtained with the event plane and four-particle cumulant methods are reported for the pseudo-rapidity range |η|<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 the event plane 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.

Original languageEnglish
Pages (from-to)18-28
JournalPhysics Letters B
Volume719
Issue number1-3
Early online date4 Jan 2013
DOIs
Publication statusPublished - 12 Feb 2013

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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