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System-size dependence of transverse momentum correlations at $\sqrt{s_{NN}}=62.4$ and 200 GeV at the BNL Relativistic Heavy Ion Collider

The STAR collaboration
Phys.Rev.C 87 (2013) 064902, 2013.

Abstract (data abstract)
We present a study of the average transverse momentum ($p_{t}$) fluctuations and pt correlations for charged particles produced in Cu+Cu collisions at midrapidity for $\sqrt{s_{NN}}$ = 62.4 and 200 GeV. These results are compared with those published for Au+Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the pt correlation results have been studied as functions of the collision centralities, the ranges in $p_{t}$, the pseudorapidity $\eta$, and the azimuthal angle $\phi$. The square root of the measured pt correlations when scaled by mean pt is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.

  • Figure 1

    Data from Figure 1

    10.17182/hepdata.103060.v1/t1

    Event-by-event $\langle p_{t}\rangle$ distributions for data and mixed events in central Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 and 62.4 GeV.

  • Figure 2 Au+Au

    Data from Figure 2 Au+Au

    10.17182/hepdata.103060.v1/t2

    Comparison of dynamical $\langle p_{t}\rangle$ fluctuations in Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 and 200 GeV as a...

  • Figure 2 Cu+Cu 62.4 GeV

    Data from Figure 2 Cu+Cu 62.4 GeV

    10.17182/hepdata.103060.v1/t3

    Comparison of dynamical $\langle p_{t}\rangle$ fluctuations in Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 and 200 GeV as a...

  • Figure 2 Cu+Cu 200 GeV

    Data from Figure 2 Cu+Cu 200 GeV

    10.17182/hepdata.103060.v1/t4

    Comparison of dynamical $\langle p_{t}\rangle$ fluctuations in Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 and 200 GeV as a...

  • Figure 3 Au+Au 62.4 and 200 GeV

    Data from Figure 3 Au+Au 62.4 and 200 GeV

    10.17182/hepdata.103060.v1/t5

    (a) $p_{t}$ correlations, (b) $p_{t}$ correlations multiplied by $\langle N_{part}\rangle/2$, (c) square root of $p_{t}$ correlations scaled by $\langle\langle p_{t}\rangle\rangle$,...

  • Figure 3 Cu+Cu 62.4 GeV

    Data from Figure 3 Cu+Cu 62.4 GeV

    10.17182/hepdata.103060.v1/t6

    (a) $p_{t}$ correlations, (b) $p_{t}$ correlations multiplied by $\langle N_{part}\rangle/2$, (c) square root of $p_{t}$ correlations scaled by $\langle\langle p_{t}\rangle\rangle$,...

  • Figure 3 Cu+Cu 200 GeV

    Data from Figure 3 Cu+Cu 200 GeV

    10.17182/hepdata.103060.v1/t7

    (a) $p_{t}$ correlations, (b) $p_{t}$ correlations multiplied by $\langle N_{part}\rangle/2$, (c) square root of $p_{t}$ correlations scaled by $\langle\langle p_{t}\rangle\rangle$,...

  • Figure 4 Au+Au 200 GeV

    Data from Figure 4 Au+Au 200 GeV

    10.17182/hepdata.103060.v1/t8

    Comparison of scaled $p_{t}$ correlations between data and models for Au+Au [panels (a) and (c)] and Cu+Cu [panels (b) and...

  • Figure 4 Cu+Cu 200 GeV

    Data from Figure 4 Cu+Cu 200 GeV

    10.17182/hepdata.103060.v1/t9

    Comparison of scaled $p_{t}$ correlations between data and models for Au+Au [panels (a) and (c)] and Cu+Cu [panels (b) and...

  • Figure 5

    Data from Figure 5

    10.17182/hepdata.103060.v1/t10

    $p_{t}$ correlations for varying rapidity acceptance ($|\eta|$ <0.25, 0.5, and 1.0) for Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV [panel...

  • Figure 6 Cu+Cu 62.4 GeV

    Data from Figure 6 Cu+Cu 62.4 GeV

    10.17182/hepdata.103060.v1/t11

    $p_{t}$ correlations for varying azimuthal acceptance for Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV [panels (a) and (c)] and 62.4...

  • Figure 6 Cu+Cu 200 GeV

    Data from Figure 6 Cu+Cu 200 GeV

    10.17182/hepdata.103060.v1/t12

    $p_{t}$ correlations for varying azimuthal acceptance for Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV [panels (a) and (c)] and 62.4...

  • Figure 7 Cu+Cu 62.4 GeV

    Data from Figure 7 Cu+Cu 62.4 GeV

    10.17182/hepdata.103060.v1/t13

    $p_{t}$ correlations plotted as a function of $\langle N_{part}\rangle$ for different $p_{t}$ ranges in Cu+Cu collisions at (a) 200 GeV...

  • Figure 7 Cu+Cu 200 GeV

    Data from Figure 7 Cu+Cu 200 GeV

    10.17182/hepdata.103060.v1/t14

    $p_{t}$ correlations plotted as a function of $\langle N_{part}\rangle$ for different $p_{t}$ ranges in Cu+Cu collisions at (a) 200 GeV...

  • Figure 8

    Data from Figure 8

    10.17182/hepdata.103060.v1/t15

    Correlations for varying $p_{t}$ ranges for different model calculations in Cu+Cu 200 GeV. (a) AMPT (SM), (b) URQMD, and (c)...

  • Figure 9 top panel

    Data from Figure 9 top panel

    10.17182/hepdata.103060.v1/t16

    Uncorrected inclusive charged particle $p_{t}$ spectrum for 0%–10% collision centrality for Cu+Cu 200 GeV (open circles).

  • Figure 9 bottom panel

    Data from Figure 9 bottom panel

    10.17182/hepdata.103060.v1/t17

    Correlations scaled by $(d\langle p_{t}\rangle/dT)^{2}T^{2}$ vs. $\langle N_{part}\rangle$ for different $p_{t}$ ranges in Cu+Cu 200 GeV.

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