Comparing different freeze-out scenarios in azimuthal hadron correlations induced by fast partons

TL;DR

This paper compares two freeze-out scenarios in hydrodynamical models of quark-gluon plasma to understand azimuthal hadron correlations induced by fast partons, emphasizing the importance of realistic freeze-out modeling.

Contribution

It introduces a comparative analysis of freeze-out scenarios in hydrodynamical simulations of parton-induced correlations, highlighting their impact on observable azimuthal spectra.

Findings

Different freeze-out scenarios produce significantly different azimuthal particle spectra.

Realistic freeze-out implementation is crucial for accurate comparison with experimental data.

Hydrodynamical response to fast partons can be effectively modeled using numerical solutions.

Abstract

I review the linearized hydrodynamical treatment of a fast parton traversing a perturbative quark-gluon plasma. Using numerical solutions for the medium's response to the fast parton, I obtain the medium's distribution function which is then used in a Cooper-Frye freeze-out prescription to obtain an azimuthal particle spectrum. Two different freeze-out scenarios are considered which yield significantly different results. I conclude that any meaningful comparison of azimuthal hadron correlation functions to RHIC data requires implementing a realistic freeze-out scenario in an expanding medium.