Studying Elliptic Flow in High Centrality Pb-Pb Collisions using Proton Collision Background Fitting

Sammanfattning: In this report, the elliptic flow in high centrality Pb-Pb collisions is calculated using two particle correlations $v_2\{2\}$ but without any imposed separation in η with data taken from the ALICE experiment at CERN in 2015. Instead, measurements of the same correlations in proton-proton collisions is used as a background to account for non-flow effects and data is correlated between the time projection chamber and the forward multiplicity detectors in order to avoid intra-jet correlations. Results were possible to attain up to 80% centrality but beyond this point the fitting failed in what was likely due to a lack of statistics. The results seemed to agree well with previous computations on ALICE data.