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Azimuthal anisotropy of $\pi^0$ and $\eta$ mesons in Au + Au collisions at $\sqrt{{s}_{NN}} =$ 200 GeV

The PHENIX collaboration
Phys.Rev.C 88 (2013) 064910, 2013.

Abstract (data abstract)
BNL-RHIC. The azimuthal anisotropy coefficients $v_2$ and $v_4$ of $\pi^0$ and $\eta$ mesons are measured in Au+Au collisions at $\sqrt{s_NN}$=200 GeV, as a function of transverse momentum $p_T$ (1-14 GeV/c) and centrality. The extracted $v_2$ coefficients are found to be consistent between the two meson species over the measured $p_T$ range. The ratio of $v_4/v_2^2$ for $\pi^0$ mesons is found to be independent of $p_T$ for 1-9 GeV/$c$, implying a lack of sensitivity of the ratio to the change of underlying physics with $p_T$. Furthermore, the ratio of $v_4/v_2^2$ is systematically larger in central collisions, which may reflect the combined effects of fluctuations in the initial collision geometry and finite viscosity in the evolving medium.

  • Figure 7-1

    10.17182/hepdata.96550.v1/t1

    $\eta$ meson $v_2, 0-20\%$ centrality

  • Figure 7-2

    10.17182/hepdata.96550.v1/t2

    $\eta$ meson $v_2, 20-60\%$ centrality

  • Figure 8-1

    10.17182/hepdata.96550.v1/t3

    $\pi^0$ meson $v_4, 0-20\%$ centrality

  • Figure 8-2

    10.17182/hepdata.96550.v1/t4

    $\pi^0$ meson $v_4, 20-40\%$ centrality

  • Figure 8-3

    10.17182/hepdata.96550.v1/t5

    $\pi^0$ meson $v_4, 40-60\%$ centrality

  • Figure 8-4

    10.17182/hepdata.96550.v1/t6

    $\pi^0$ meson $v_4, 20-60\%$ centrality

  • Figure 9-1

    10.17182/hepdata.96550.v1/t7

    $\pi^0$ meson $v_4/v_2^2, 0-20\%$ centrality

  • Figure 9-2

    10.17182/hepdata.96550.v1/t8

    $\pi^0$ meson $v_4/v_2^2, 20-40\%$ centrality

  • Figure 9-3

    10.17182/hepdata.96550.v1/t9

    $\pi^0$ meson $v_4/v_2^2, 40-60\%$ centrality

  • Figure 9-4

    10.17182/hepdata.96550.v1/t10

    $\pi^0$ meson $v_4/v_2^2, 20-60\%$ centrality

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