Measurements of two-particle correlations of inclusive and identified charged particles performed with the ALICE detector in Pb--Pb collisions at $\sqrt{ s_{ NN}} = 2.76 TeV$ are presented. The near-side jet shape is analyzed in the low $p_{ \rm T}$ regions ($1<$p_{ \rm T}$<8GeV/c$). While the RMS of the peak in $\Delta\varphi$-direction is independent of centrality within uncertainties, we find significant broadening in $\Delta\eta$-direction from peripheral to central collisions. The near-side $p/\pi$ ratio of particles associated to a trigger particle from jet fragmentation in the central Pb--Pb collisions is consistent with vacuum fragmentation in the measured momentum region ($1.5<$p_{ \rm T}$<4.5GeV\c$).
Categories: nucl-ex hep-ex