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System-size dependence of transverse momentum correlations at √sNN=62.4 and 200 GeV at the BNL Relativistic Heavy Ion Collider

Abstract : We present a study of the average transverse momentum ($p_t$) fluctuations and $p_t$ 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 same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the $p_t$ correlations results have been studied as functions of the collision centralities, the ranges in $p_t$, the pseudo-rapidity $\eta$, and the azimuthal angle $\phi$, for which the correlations are measured. The square root of the measured $p_t$ correlations when scaled by mean-$p_t$ are found to be independent of both colliding beam energy and system size studied. The transport based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jet-like correlations.
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http://hal.in2p3.fr/in2p3-00807105
Contributor : Sylvie Flores <>
Submitted on : Wednesday, April 3, 2013 - 7:23:41 AM
Last modification on : Thursday, February 7, 2019 - 2:55:05 PM

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L. Adamczyk, W. Borowski, S. Kabana. System-size dependence of transverse momentum correlations at √sNN=62.4 and 200 GeV at the BNL Relativistic Heavy Ion Collider. Physical Review C, American Physical Society, 2013, 87, pp.064902. ⟨10.1103/PhysRevC.87.064902⟩. ⟨in2p3-00807105⟩

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