PhD defense by Alexander Hansen – University of Copenhagen

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PhD defense by Alexander Hansen

Title: Pseudorapidity Dependence of Anisotropic AzimuthalFlow with the ALICE Detector

Abstract: In ultra-relativistic heavy-ion collisions a new state of matter known as the strongly interacting quark-gluon plasma (sQGP) is produced. A key observable in the study of the sQGP is anisotropic azimuthal flow. The anisotropies are described by flow harmonics, v_n. In this thesis, bias arising from non-uniform azimuthal acceptance and the effect of flow fluctuations are investigated. The main result is an analysis of the pseudorapidity (eta) dependence of v_2, v_3 and v_4 over a wide kinematic range: -3.5 < eta < 5.0 in Pb-Pb collisions at √s_NN = 2.76 TeV. The analysis is performed using the ALICE Forward Multiplicity Detector and Silicon Pixel Detector at the CERN Large Hadron Collider (LHC). The results are compared to other LHC experiments and previous experiments at lower collision energies.