Possible Improvements of the Signal Selections in ATLAS for Dark Matter Production in association with Heavy Flavour Quarks

During this Summer Student Programme at CERN I had the opportunity to join the DM+HF ATLAS group working on WIMPs pair production associated with heavy flavour (bottom and top) quarks, arising from proton-proton collisions at the LHC. My project focused on Dark Matter production involving bottom quarks, in 13.3 fb−1 of pp collisions data collected at a centre-of-mass energy of √s = 13 TeV with the ATLAS detector at the LHC (Run 2) [1] [2]. I was using the ROOT analysis framework to discriminate background (reactions involving W and Z bosons jets, top-antitop quarks and top squarks, and others) from signal (those involving bottom-antibottom quarks).