Jet modification and a comparative study of hadron v2 measurements in sqrt(s_NN) = 200 GeV Au+Au collisions at RHIC-PHENIX

TL;DR

This paper investigates the azimuthal anisotropy of hadrons in high-energy gold-gold collisions at RHIC, comparing jet modifications and v2 measurements to understand the medium's effects on hard scattering processes.

Contribution

It provides a comparative analysis of v2 measurements for inclusive and hard-scattering hadrons and examines jet widths using PYTHIA simulations in heavy-ion collisions.

Findings

No significant difference between v2 of inclusive and hard-scattering hadrons.

Near-side jet widths are consistent with PYTHIA simulations.

Results suggest similar flow behavior for different hadron sources.

Abstract

In this analysis we measure the azimuthal angle($\phi$) dependence of hadrons with respect to the reaction plane ($\Psi_{RP}$) in events that were triggered by a high-$p_T$ $\pi^0$ of 5-10 GeV. Fitting the distribution of hadrons with a function of the type $\xi(1+2v_2\cos{(2(\phi-\Psi_{RP})}))$, we observe that there is no significant statistical difference between $v_2$ inclusive hadrons and those hadrons from hard scattering events. We also compare the near-side jet widths using PYTHIA simulations with $h^{\pm}$-$h^{\pm}$ correlations in Au+Au at $\sqrt{s_{NN}}=200$ GeV.