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Nominated as an outstanding Ph.D. thesis by University of Geneva, Switzerland
Presents the first LHC results on compressed super symmetry with low pT leptons in the final state
Describes the first measurement of the inclusive cross-section for electron production from heavy flavour decays at ATLAS
The first part of this thesis presents the measurement of the inclusive cross-section for electron production from heavy-flavour decays in the electron transverse momentum range 7 GeV < pT < 26 GeV using 1.3 pb−1 of 7 TeV proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the cross-section within the fiducial range of the analysis is σ_e^HF = 0.946 ± 0.020(stat.) ± 0.146(syst.) ± 0.032(lumi.) μb. Theoretical predictions are in good agreement with the measurement. The second part of this thesis is a search for compressed supersymmetric scenarios in events with missing transverse energy, jets, and one isolated low-pT lepton in the final state using 4.7 fb-1 of ATLAS data collected at 7 TeV center-of-mass energy in 2011. No significant excess of events over the Standard Model expectation is observed and exclusion limits are derived for a number of supersymmetric models.
Content Level »Research
Keywords »ATLAS Experiment at CERN - Compressed Supersymmetry - Heavy-flavour Decays - Inclusive Electron Cross-section - Supersymmetric Scenarios - Tests of Standard Model