Autocorrelations from the scale dependence of transverse-momentum fluctuations in Hijing-simulated Au-Au collisions at $\sqrt{s_{NN}} = $ 200 GeV

Qingjun Liu; Duncan J. Prindle; Thomas A. Trainor

doi:10.1016/j.physletb.2005.10.043

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arXiv · hep-ph/0410180

Autocorrelations from the scale dependence of transverse-momentum fluctuations in Hijing-simulated Au-Au collisions at $\sqrt{s_{NN}} = $ 200 GeV

Qingjun Liu·Duncan J. Prindle·Thomas A. Trainor

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Abstract

We present measurements of the scale (bin-size) dependence of event-wise mean transverse momentum $ $ fluctuations for Au-Au collisions at $\sqrt{s_{NN}} = 200$ GeV simulated with the Hijing-1.37 Monte Carlo. We invert those scale distributions to obtain autocorrelation distributions on pseudorapidity $η$ and azimuth $ϕ$ difference variables $(η_Δ,ϕ_Δ)$. The autocorrelations have a simple structure dominated by a same-side (on azimuth) peak with similar widths on the two difference variables. With jet quenching imposed, the same-side peak widths increase slightly in both directions, and the amplitude is substantially reduced. The same-side peaks are attributed to minijets, observed in this study as local {\em velocity} correlations of charged particles with $p_t < $ 2 GeV/c.

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Qingjun Liu, Duncan J. Prindle, Thomas A. Trainor. 2006-11-03. Autocorrelations from the scale dependence of transverse-momentum fluctuations in Hijing-simulated Au-Au collisions at $\sqrt{s_{NN}} = $ 200 GeV. https://doi.org/10.1016/j.physletb.2005.10.043

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