Speaker
Description
Measurements of the azimuthal anisotropy coefficients ($v_n$) of particle emission are an established method to characterize the quark gluon plasma (QGP) generated in the high-energy heavy-ions collisions. An important early finding at RHIC was that hydrodynamic calculations can account for the measured anisotropy at low $p_{T}$ and relate them to the collision geometry. At higher $p_{T}$, where hard processes are dominant, energy loss of partons traversing the QGP also creates an azimuthal anisotropy in the final-state hadrons which is related to the collision geometry. In order to better understand the interplay between the soft and hard processes, PHENIX measured the charged-hadron $v_{n}$ coefficients over a wide $p_{T}$ range (up to 10 GeV/$c$) as a function of centrality and beam energy.
In this talk, we will present new $v_{2}$ measurements for charged hadrons in 200 GeV Au+Au collisions as a function of $p_T$ and centrality and compare them to those from $\pi^{0}$ mesons. We will also report the $v_{2}$, $v_{3}$, and $v_{4}$ results for charged hadrons as function of the beam energy from 39 to 200 GeV.
| Preferred Track | Collective Dynamics |
|---|---|
| Collaboration | PHENIX |
