Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at $\snn=2.76$ TeV - Université de Nantes Accéder directement au contenu
Article Dans Une Revue Physics Letters B Année : 2013

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

B. Abelev
  • Fonction : Auteur
C. Roy
Laurent Aphecetche
Guillaume Batigne
E. Bergognon
  • Fonction : Auteur
Magali Estienne
Marie Germain
Gines Martinez Garcia
Philippe Pillot
Alexandre Shabetai
Diego Stocco
Sang Un Ahn
  • Fonction : Auteur
  • PersonId : 766376
  • IdRef : 161109462
B. Cheynis
Maxime Guilbaud

Résumé

The elliptic, $v_2$, triangular, $v_3$, and quadrangular, $v_4$, flow coefficients are measured for unidentified charged particles, pions and (anti-)protons in Pb-Pb collisions at $\snn = 2.76$ 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 $\pt$.

Dates et versions

in2p3-00703611 , version 1 (04-06-2012)

Identifiants

Citer

B. Abelev, N. Arbor, G. Conesa Balbastre, J. Faivre, C. Furget, et al.. Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at $\snn=2.76$ TeV. Physics Letters B, 2013, 719, pp.18-28. ⟨10.1016/j.physletb.2012.12.066⟩. ⟨in2p3-00703611⟩
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