Speaker
Description
The study of the azimuthal correlation and anisotropy with $\pi^0$ offers a powerful way to investigate the properties of strongly interacting matter created in ultra-relativistic heavy-ion collisions. In this talk, we present the measurement of two-particle correlations of $\pi^0$ trigger particles with associated charged particles versus azimuthal angle difference ($\Delta\varphi$) in pp and central Pb–Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV, as well as the measurement of the elliptic flow ($v_2$) of π0 in Pb-Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV at the ALICE experiment. $\pi^0$ are detected by the ALICE electromagnetic calorimeter EMCal for transverse momenta $8< p_T <16$ GeV/c, and charged particles are measured by the ALICE main tracking detectors ITS and TPC for $0.5 < p_T < 10$ GeV/c, both at mid-rapidity. For $\pi^0$-hadron correlations, the per-trigger yield modification factors ($I_{AA}$) are extracted on the near and away side and are compared with results from models and other experiments. For $\pi^0$ $v_2$, the current status will be presented. Both measurements serve as important investigation of the medium modified fragmentation pattern and the path-length dependence of energy loss in QGP, as well as the corresponding physics interpretation.
Presentation type | Oral |
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