Jet-like two-particle correlations in p-Pb collisions

The thesis presents the first measurement of the yields of jet-like structures at low transverse momentum in p-Pb collisions. A statistical method known as two-particle correlations is used to overcome the difficulties in identifying such structures with standard jet-reconstruction algorithms. Moreover, a subtraction procedure has been developed to disentangle the jet-like contribution from the long-range correlations structures (so-called 'double ridge'), found in p-Pb collisions, which are attributed to collective-like phenomena. Results show that the jet-like yields, unlike the double ridge, do not depend on the multiplicity of the event. Through the study of jet-like structures, this method allows to estimate the number of independent sources of particle production, proportional to the number of multiparton interactions in PYTHIA simulations.