A Contribution to the ATLAS Open Data Collaboration at CERN

ATLAS Open Data Collaboration aims at giving open access to proton-proton collision data collected by the ATLAS experiment at the LHC, as well as release relevant tools needed for analysis to the public. A review of available resources from the Open Data educational platform, as well as analysis development and update of various signals has been carried out. This dissertation further contributes to the open access educational tools and helps lift the limited person-power problem and reproducibility issues imposed by the blue-sky research undertaken at CERN. This is done through the replication of $HZZ$ and $H$𝛾𝛾 studies from the first research paper on the observation of the Higgs boson, as well as through the development of $ZZ$ and heavy $ZZ$ resonance analyses. A reproduction of selected results from four different papers published by the ATLAS Collaboration has been achieved. The analyses performed on $HZZ$, $H$𝛾𝛾, and $ZZ$ decays isolated the required signal events to a reasonable extent, validating them on the new 13 TeV data set. These are ready to be implemented into the educational platform now. The heavy $ZZ$ resonance analysis excluded the mass of the Kaluza–Klein Graviton $G$ up to mass of 1000 GeV. With minor adjustments discussed in this dissertation, this analysis can also be implemented into the educational platform.