Search for Top Squarks via All-hadronic Decay Channels with Heavy Object Tagging
Ecklund, Karl; Padley, Paul
Doctor of Philosophy
A search for the stop quark from direct production via the all-hadronic decay channel is performed on 136.7 fb^−1 at a center-of-mass energy of 13 TeV from Run 2 of the LHC. Events are categorized into exclusive regions designed to optimize the different search topologies of the analysis. The analysis concentrates on identifying heavy objects such as top quarks and W boson from their decays using a custom tagger for resolved tops and multivariate methods for others. A low mass spectra is enhanced using the soft b-jet transverse momentum which is typical of signal in a boosted regime with initial-state radiation. We then provide exclusion limits for each signal in the simplified models with multiple decay products.
Supersymmetry; quarks; heavy objects; particle physics; high energy physics