Recent results on two-particle correlations in ALICE

The discovery of correlations between particles separated by several units of pseudorapidity in high-multiplicity pp and p–Pb collisions, reminiscent of structures observed in Pb–Pb collisions, was a challenge to traditional ideas about collectivity in heavy ion collisions. In order to further explore long-range correlations and provide information to theoretical models, correlations between forward trigger muons and mid-rapidity associated hadrons were measured in p–Pb collisions at √ sNN = 5.02 TeV. The results demonstrate that the nearside and awayside ridges extend to ∆η ∼ ±5 and that the v2 of muons, obtained from subtracting the correlation functions in highand low-multiplicity events, is (16 ± 6)% higher in the Pb-going than in the p-going direction. The results are compared with AMPT simulations.