Two-particle angular correlations of mesons and baryons measured in ALICE

Krystian Głuchowski (on behalf of the ALICE Collaboration), Warsaw University of Technology.

ALICE is one of the four main experiments at the Large Hadron Collider (LHC), mainly focused on heavy-ion collisions in which Quark-Gluon Plasma (QGP) could be reproduced. One of the tools to study the properties of the QGP and the process of hadron production are the two-particle angular correlations. These correlations are constructed by measuring differences in azimuthal angle (Δφ) and differences in pseudorapidity (Δη) between created particles. Two-particle angular functions reported by the ALICE collaboration show a correlation between pairs of mesons for small angular differences. However, pairs of baryons are anti-correlated in short ranges of ΔηΔφ, which is not predicted by any theoretical model. The presented work shows two-particle angular correlations in pp, p-Pb and Pb-Pb collisions measured by ALICE.