Elliptic flow of identified hadrons in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV

Abstract

The elliptic flow coefficient ($v_2$) of identified particles in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV was measured with the ALICE detector at the LHC. The results were obtained with the Scalar Product method, a two-particle correlation technique, using a pseudo-rapidity gap of $|\Delta \eta |>0.9$ between the identified hadron under study and the reference particles. The $v_2$ is reported for ${\pi }^{\pm }$, ${\mathrm{K}}^{\pm }$, ${\mathrm{K}}_{\mathrm{S}}^0$, p+$\overline{\mathrm{p}}$, $\varphi$, $\Lambda$+$\overline{\mathrm{\Lambda }}$, ${\Xi }^{-}$+${\overline{\Xi }}^{+}$ and ${\Omega }^{-}$+${\overline{\Omega }}^{+}$ in several collision centralities. In the low transverse momentum ($p_{\mathrm{T}}$) region, $p_{\mathrm{T}}<2$GeV/$c$, $v_2(p_{\mathrm{T}})$ exhibits a particle mass dependence consistent with elliptic flow accompanied by the transverse radial expansion of the system with a common velocity field. The experimental data for ${\pi }^{\pm }$ and $\mathrm{K}$ are described fairly well by hydrodynamical calculations coupled to a hadronic cascade model (VISHNU) for central collisions. However, the same calculations fail to reproduce the $v_2(p_{\mathrm{T}})$ for p+$\overline{\mathrm{p}}$, $\varphi$, $\Lambda$+$\overline{\mathrm{\Lambda }}$ and ${\Xi }^{-}$+${\overline{\Xi }}^{+}$. For transverse momentum values larger than about 3 GeV/$c$, particles tend to group according to their type, i.e. mesons and baryons. However, the experimental data at the LHC exhibit deviations from the number of constituent quark (NCQ) scaling at the level of $\pm$20$\%$ for $p_{\mathrm{T}}>3$GeV/$c$.

80 pages, 13 captioned figures in text and 50 in appendix A, 7 tables, authors from page 74, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/1742

References in corpus (13)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• The QCD equation of state with dynamical quarks
• 200 A GeV Au+Au collisions serve a nearly perfect quark-gluon liquid
• Suppression of elliptic flow in a minimally viscous quark-gluon plasma
• Scaling properties of azimuthal anisotropy in Au+Au and Cu+Cu collisions at sqrt(s_NN) = 200 GeV
• Multiplicity scaling in ideal and viscous hydrodynamics
• Centrality dependence of charged hadron and strange hadron elliptic flow from sqrt(s_NN) = 200 GeV Au+Au collisions
• Effect of flow fluctuations and nonflow on elliptic flow methods
• Eccentricity fluctuations from the Color Glass Condensate at RHIC and LHC
• Eccentricity fluctuations and elliptic flow at RHIC
• Elliptic flow for phi mesons and (anti)deuterons in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Hadron spectra and elliptic flow for 200 A GeV Au+Au collisions from viscous hydrodynamics coupled to a Boltzmann cascade
• Azimuthally sensitive correlations in nucleus-nucleus collisions

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