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Incident energy dependence of pt correlations at RHIC

The STAR collaboration
Phys.Rev.C 72 (2005) 044902, 2005.

Abstract
We present results for two-particle transverse momentum correlations, <dpt,i dpt,j>, as a function of event centrality for Au+Au collisions at sqrt(sNN) = 20, 62, 130, and 200 GeV at the Relativistic Heavy Ion Collider. We observe correlations decreasing with centrality that are similar at all four incident energies. The correlations multiplied by the multiplicity density increase with incident energy and the centrality dependence may show evidence of processes such as thermalization, minijet production, or the saturation of transverse flow. The square root of the correlations divided by the event-wise average transverse momentum per event shows little or no beam energy dependence and generally agrees with previous measurements at the Super Proton Synchrotron.

  • Table 1t

    Data from Figure 1 - top

    10.17182/hepdata.102946.v1/t1

    Average transverse momentum per event for Au+Au at $\sqrt{s_{NN}}$ = 20 GeV for the 5% most central collisions.

  • Table 1tm

    Data from Figure 1 - top,middle

    10.17182/hepdata.102946.v1/t2

    Average transverse momentum per event for Au+Au at $\sqrt{s_{NN}}$ = 62 GeV for the 5% most central collisions.

  • Table 1bm

    Data from Figure 1 - bottom,middle

    10.17182/hepdata.102946.v1/t3

    Average transverse momentum per event for Au+Au at $\sqrt{s_{NN}}$ = 130 GeV for the 5% most central collisions.

  • Table 1b

    Data from Figure 1 - bottom

    10.17182/hepdata.102946.v1/t4

    Average transverse momentum per event for Au+Au at $\sqrt{s_{NN}}$ = 200 GeV for the 5% most central collisions.

  • Table 2

    Data from Figure 2

    10.17182/hepdata.102946.v1/t5

    $<\Delta p_{t,i}\Delta p_{t,j}>$ as a function of centrality and incident energy for Au+Au collisions compared with HIJING results.

  • Table 3

    Data from Figure 3

    10.17182/hepdata.102946.v1/t6

    (d$N/\textrm{d}\eta)<\Delta p_{t,i}\Delta p_{t,j}>$ as a function of centrality and incident energy for Au+Au collisions compared with HIJING results.

  • Table 4

    Data from Figure 4

    10.17182/hepdata.102946.v1/t7

    $(<\Delta p_{t,i}\Delta p_{t,j}>)^{1/2}/<<p_{t}>>$ as a function of centrality and incident energy for Au+Au collisions compared with HIJING results.

  • Table 4inset

    Data from the inset of Figure 4

    10.17182/hepdata.102946.v1/t8

    $(<\Delta p_{t,i}\Delta p_{t,j}>)^{1/2}/<<p_{t}>>$ as a function of incident energy for 0-5% most central Au+Au collisions compared with CERES results.

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