Study of the shape of the near-side peak in two-particle correlations in collisions of pp, p-Pb and Pb-Pb

In this analysis note we study the evolution of the width of the near-side jet-like peak with transverse momentum and multiplicity for pp, p-Pb and Pb-Pb collisions. We perform a long-range extrapolation over small values of ∆η in order to isolate the short-range correlation. We do the analysis for charged hadrons first, and then use identified particles (pions, kaons, protons) to get a better understanding.