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Azimuthal anisotropy and correlations at large transverse momenta in p+p and Au+Au collisions at s(NN)**(1/2) = 200-GeV

The STAR collaboration
Phys.Rev.Lett. 93 (2004) 252301, 2004.

Abstract (data abstract)
Results on high transverse momentum charged particle emission with respect to the reaction plane are presented for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Two- and four-particle correlations results are presented as well as a comparison of azimuthal correlations in Au+Au collisions to those in $p+p$ at the same energy. Elliptic anisotropy, $v_{2}$, is found to reach its maximum at $p_{t}$ ∼ 3 GeV/c, then decrease slowly and remain significant up to $p_{t} \approx$ 7 -- 10 GeV/c. Stronger suppression is found in the back-to-back high-pt particle correlations for particles emitted out-of-plane compared to those emitted in-plane. The centrality dependence of $v_{2}$ at intermediate pt is compared to simple models based on jet quenching.

  • Figure 1

    Data from Figure 1

    10.17182/hepdata.100594.v1/t1

    Azimuthal correlations in Au+Au col- lisions (squares) as a function of centrality (peripheral to cen- tral from left to right)...

  • Figure 2

    Data from Figure 2

    10.17182/hepdata.100594.v1/t2

    $v_{2}$ of charged particles as a function of transverse momentum from the two-particle cumu- lant method (triangles) and four-particle cumulant...

  • Figure 3_1

    Data from Figure 3

    10.17182/hepdata.100594.v1/t3

    Upper panel, Azimuthal distributions of associated particles for trigger particles in-plane (squares) and out-of-plane (triangles) for Au+Au collisions at centrality...

  • Figure 3_2

    Data from Figure 3

    10.17182/hepdata.100594.v1/t4

    Upper panel, Azimuthal distributions of associated particles for trigger particles in-plane (squares) and out-of-plane (triangles) for Au+Au collisions at centrality...

  • Figure 4

    Data from Figure 4

    10.17182/hepdata.100594.v1/t5

    $v_{2}$ at 3 ≤ $p_{t}$ ≤ 6 GeV/c versus impact parameter, b, compared to models of particle emission by a...

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