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

ALICE is one of the four main experiments at the Large Hadron Collider (LHC), mainly focused on heavy-ion collisions in which the Quark-Gluon Plasma (QGP) could be produced. One of the tools to study the properties of the QGP and the process of hadron production are 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 correlation 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 (Δη, ΔΦ), which is not predicted by any theoretical model. The presented work shows two-particle angular correlations in pp collisions measured by ALICE.