X(3872) analysis for run 5 with the O2 framework

Abstract

In this thesis we perform simulation studies on the exotic X(3872) hadron for the future heavy ion detector at the LHC for run 5. The X(3872) is reconstructed via its decay X(3872) to J/psi pi+ pi-, where J/psi to e+e-. This is a daunting endeavor in part due to the very low transverse momentum of the pion daughters, but with the proposed upgrades to the detector for run 5 (ALICE 3) this analysis may prove feasible. We provide a framework for the X(3872) reconstruction within the heavy flavour software framework, taking advantage of its modular structure. With a preliminary selection strategy, we report an efficiency ranging from approximately 0.03 to 0.22 for 0< pT < 15 GeV/c, with a significance on the order of 10^-1. A first look at a different selection strategy provides significant improvements with an efficiency between roughly 0.19 to 0.6, and doubling the significance. This highlights the potential of the analysis on X(3872) for run 5.