22-27 September 2016
East Lake International Conference Center
Asia/Chongqing timezone
<a href="http://hp2016.ccnu.edu.cn">http://hp2016.ccnu.edu.cn</a>

$\pi^0$-hadron correlations in pp and Pb-Pb collisions and $\pi^0$ elliptic flow in Pb-Pb collisions measured at the ALICE experiment

25 Sep 2016, 08:30
Shi-Yan Hall (East Lake International Conference Center)

Shi-Yan Hall

East Lake International Conference Center

Donghu Road 142, Wuchang District, Wuhan, Hubei, China


Xinye Peng (Central China Normal University CCNU (CN))


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

Primary author

Xinye Peng (Central China Normal University CCNU (CN))

Presentation Materials