Photoproduction of $J/\psi$ in ultra-peripheral p-Pb and Pb-Pb collisions with the ALICE detector at the LHC

The physics of ultra-peripheral collisions is introduced in the first part along with the fundamental concepts of several theoretical models. The measurement of photoproduction of vector mesons off proton and lead nucleus allows to study the QCD structure of these targets at energies that have never been measured before. The next parts of the text describe the measurements, the results, and present the physics discussion of the results. The aim of the thesis is to present the analysis of coherent $J/\psi$ photoproduction in the forward rapidity in ultra-peripheral Pb-Pb collisions and the analysis of exclusive $J/\psi$ photoproduction in ultra-peripheral p-Pb collisions in the forward, semi-forward and central rapidity. The personal contribution of the author in the Pb-Pb analysis consists in the determination of the efficiency of coherent, incoherent and two-photon processes and computations of the feed-down correction. In the case of the p-Pb analyses, the author has prepared and managed the official and auxiliary MC productions for all three rapidity intervals, determined the efficiency and feed-down corrections for the forward rapidity, and, with the exception of the luminosity calculation, conducted the full scope of the analyses in the semi-forward and central rapidities.