Modification of Jet Spectra with Respect to the Medium in JEWEL

Sammanfattning

The goal of this thesis was to investigate the path-length dependence of jet suppression for jets propagating through a medium known as the quark–gluon plasma (QGP). The QGP is formed in collisions between two lead (Pb) ions, where the overlap region consists of participant nucleons distributed in an approximately elliptical geometry. Simulations of jet quenching in these collisions were performed using JEWEL together with the Glauber and Trajectum models. The former was used to describe the initial state, while the latter described the final state. Events containing jets were categorized according to their initial-state eccentricity ε2 and their final-state elliptic flow, quantified by the parameter q2. The jets were then further separated into in-plane and out-of-plane groups with respect to the short axis of the elliptical collision region. Across both models, out-of-plane jets were observed to be more suppressed than in-plane jets. This thesis successfully reproduced a measurement previously performed by the ALICE Collaboration at CERN. Furthermore, the results suggest that the observed path-length dependence is independent of the choice of models used, further validating its existence.