The Search for Supersymmetry in Hadronic Final States Using Boosted Object Reconstruction
This thesis represents one of the most comprehensive and in-depth studies of the use of Lorentz-boosted hadronic final state systems in the search for signals of Supersymmetry conducted to date at the Large Hadron Collider. A thorough assessment is performed of the observables that provide enhanced sensitivity to new physics signals otherwise hidden under an enormous background of top quark pairs produced by Standard Model processes. This is complemented by an ingenious analysis optimization procedure that allowed for extending the reach of this analysis by hundreds of GeV in mass of these hypothetical new particles. Lastly, the combination of both deep, thoughtful physics analysis with the development of high-speed electronics for identifying and selecting these same objects is not only unique, but also revolutionary. The Global Feature Extraction system that the author played a critical role in bringing to fruition represents the first dedicated hardware device for selecting these Lorentz-boosted hadronic systems in real-time using state-of-the-art processing chips and embedded systems.
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SlowControl and Monitoring
D N1 Plots
E ttbar HeavyFlavor ClassificationFlavor Contamination
F Sample List
G ModelDependent Limits by Region
H HEPData Plots
9 Upgrade Studies
A Optimizing Optimizations
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1-lepton algorithm allows analysis applied arXiv ATLAS ATLAS Collaboration ATLAS detector b-jets b-tagging background beam boosted boson calculation calibration calorimeter channel collisions component correction corresponding decay defined described designed detector distribution efficiency electromagnetic electron EmissT energy example expected factor field Figure final function gFEX gluino gluons gTowers hadronic hep-ex Higgs identify impact included interactions isolated kinematic leading lepton limits luminosity mass measured momentum muon objects observed offline jet optimization parameter particles parton performed Phys physics pile-up plots predicted processes production proton reconstructed regions represents requirement resolution samples scale Search Sect selection shower shown shows signal signal regions significant Simulation single Standard studies Supersymmetry systematic Table theory thesis top quark tracks transverse trigger trigger jet truth uncertainty variables