Azimuthal anisotropy in Au+Au collisions at s(NN)**(1/2) = 200-GeV

The STAR collaboration
Phys.Rev.C 72 (2005) 014904, 2005.

Abstract
The results from the STAR Collaboration on directed flow (v_1), elliptic flow (v_2), and the fourth harmonic (v_4) in the anisotropic azimuthal distribution of particles from Au+Au collisions at sqrtsNN = 200 GeV are summarized and compared with results from other experiments and theoretical models. Results for identified particles are presented and fit with a Blast Wave model. Different anisotropic flow analysis methods are compared and nonflow effects are extracted from the data. For v_2, scaling with the number of constituent quarks and parton coalescence is discussed. For v_4, scaling with v_2^2 and quark coalescence is discussed.

  • Figure 2_1

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    Directed flow of charged hadrons v1{3} as a function of pseudorapidity for 10–70% centrality.

  • Figure 2_2

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    Directed flow of charged hadrons v1 {EP1,EP2} as a function of pseudorapidity for 20–60% centrality.

  • Figure 4

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    Charged hadron v2 for the centrality bins 5 to 10% and in steps of 10% starting at 10, 20, 30,...

  • Figure 5

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    Charged hadron v2 for the centrality bin 0-50%.

  • Figure 6_1

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    v2(4) vs. p_T for pions for 20 - 60% centrality

  • Figure 6_2

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    v2(4) vs. p_T for kaons for 20 - 60% centrality

  • Figure 6_3

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    v2(4) vs. p_T for anti-protons for 20 - 60% centrality

  • Figure 7a

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    v2(2) vs. centrality for pions

  • Figure 7b

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    v2(2) vs. centrality for kaons

  • Figure 7c

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    v2(2) vs. centrality for anti-protons

  • Figure 8

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    v2 vs. p_T for particles identified in the RICH (min. bias) for pions+kaons and protons/antiprotons

  • Figure 9_1

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    v2 for Kshort for min. bias

  • Figure 9_2

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    v2 for kaons from kinks for min. bias

  • Figure 9_3

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    v2 for kaons from dE/dx for min. bias

  • Figure 10

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    v2 for Lambda+Lambdabar for min. bias [PRL/92/052302/2004]. The PHENIX data are from [PRL/91/182301/2003]. The hydro calculations are from [P. Huovinen/private...

  • Figure 11_1

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    v2 for charged pions for min. bias. kaon data points are from Figure 9.

  • Figure 11_2

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    v2 for anti-protons for min. bias. kaon data points are from Figure 9.

  • Figure 12_1

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    Azimuthal correlations (\sum_i cos(2(\phi_pT -\phi_i))) in Au+Au collisions as a function of p_T along with results from p+p collisions.

  • Figure 12_2

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    Azimuthal correlations (\sum_i cos(2(\phi_pT -\phi_i))) from d+Au as a function of p_T for min bias collisions.

  • Figure 13

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    Azimuthal correlations (\sum_i cos(2(\phi_pT -\phi_i))) from d+Au as a function of p_T for three centralities.

  • Figure 15 and Figure 27 - 1

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    Charged hadron v2 and v4{EP_2} as a function of pseudorapidity for minimum bias.

  • Figure 16_1

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    v2(2) and v2(4) vs. pseudorapidity

  • Figure 16_2

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    v2(2) and v2(4) vs. pseudorapidity,FTPC only

  • Figure 17_1

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    v2(4) 20-70% in TPC+FTPC and v2(2) 20-70% in FTPC.

  • Figure 17_2

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    MC v2 with FTPC momentum resolution.

  • Figure 18_1

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    Charged hadron v2 for the centrality bin 0-5% in standard and modified event plane methods.

  • Figure 18_2

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    Charged hadron v2 for the centrality bin 5-10% in standard and modified event plane methods.

  • Figure 18_3

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    Charged hadron v2 for the centrality bin 10-20% in standard and modified event plane methods.

  • Figure 18_4

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    Charged hadron v2 for the centrality bin 20-30% in standard and modified event plane methods.

  • Figure 18_5

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    Charged hadron v2 for the centrality bin 30-40% in standard and modified event plane methods.

  • Figure 18_6

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    Charged hadron v2 for the centrality bin 40-60% in standard and modified event plane methods.

  • Figure 20

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    Charged hadron v2{2} from modified reaction plane method and two-particle cumulant results (after subtracting the correlations measured in p+p collisions)...

  • Figure 21

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    v4(EP2) for charged hadrons min. bias

  • Figure 24

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    v4(EP2) vs. centrality for charged hadrons

  • Figure 25_a

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    v4(EP2) for pions in min. bias

  • Figure 25_b

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    v4(EP2) for protons in min. bias

  • Figure 25_c

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    v4(EP2) for kaons in min. bias

  • Figure 25_d

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    v4(EP2) for Lambda in min. bias

  • Figure 27 - 2

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    Charged hadron v4{EP_2} as a function of pseudorapidity for minimum bias (TPC only).

  • Figure 28

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    charged hadrons high p_T (3 - 6 GeV/c) v4(3)

  • Figure 29a

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    charged hadron integrated v2 as a function of centrality for the different methods

  • Figure 30

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    charged hadron v2(6) vs. centrality bin. v2(2) and v2(4) are from Figure 29(a).

  • Figure 31_1

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    g2 as a function of centrality from 200 GeV, 130 GeV,NA49 and q-dist methods. The solid points are from the...

  • Figure 31_2

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    wounded nucleons as a function of centrality from 200 GeV, 130 GeV,NA49 and q-dist methods.Please note that centrality percentage differs...

  • Figure 34_1

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    v2/n for pions for three centrality bins

  • Figure 34_2

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    v2/n for protons for three centrality bins

  • Figure 34_3

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    v2/n for Kshort for three centrality bins

  • Figure 34_4

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    v2/n for Lambda + Lambda bar for three centrality bins

  • Figure 38_1

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    Blast Wave parameters rho_2 from pion v2(2),pion v2 and hadron v2

  • Figure 38_2

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    Blast Wave parameters rho_4 from hadron v2

  • Figure 38_3

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    Blast Wave parameters epsilon from pion v2(2),pion v2, hadron v2 and initial

  • Figure 38_4

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    Blast Wave parameters rho_0 from pion v2(2),pion v2 and hadron v2

  • Figure 38_5

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    Blast Wave parameters T from pion v2(2),pion v2 and hadron v2

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