This thesis comprises new learn in either experimental and theoretical particle physics, making very important contributions in every one. analyses of collision info from the ATLAS scan on the LHC are offered, in addition to phenomenological stories of heavy colored resonances that may be produced on the LHC. The first information research used to be the size of most sensible quark-antiquark creation with a veto on extra jet job. because the first detector-corrected dimension of jet task in top-antitop occasions it performed an immense position in constraining the theoretical modelling, and finally decreased those uncertainties for ATLAS's different top-quark measurements by way of an element of 2. the second one facts research used to be the size of Z+2jet creation and the statement of the electroweak vector boson fusion (VBF) part. because the first commentary of VBF at a hadron collider, this size tested new strategies to reliably extract VBF tactics and cleared the path for destiny VBF Higgs measurements. The first phenomenological examine constructed a brand new approach for deciding on the color of heavy resonances produced in proton-proton collisions. As a spinoff of this examine an unforeseen and formerly neglected correlation was once stumbled on among the likelihood of safely picking a high-energy most sensible and the color constitution of the development it was once produced in. the second one phenomenological examine explored this dating in additional element, and will have vital results for the id of latest debris that decay to best quarks.