| Description |
1 online resource |
| Series |
Springer Theses |
|
Springer theses.
|
| Contents |
Intro -- Supervisor's Foreword -- Abstract -- Preface -- Hardware: HCC Testing and Irradiation -- Operation: TRT DAQ -- Standard Model Measurement: WZ Cross Section -- Electroweak Supersymmetry: Searches and Excess Follow-Up -- References -- Acknowledgements -- Contents -- 1 Introduction -- 2 Theoretical Framework -- 2.1 Introduction to the Standard Model -- 2.1.1 Symmetries and Currents -- 2.1.2 Electromagnetic Force: Quantum Electrodynamics -- 2.1.3 Strong Force: Quantum Chromodynamics -- 2.1.4 Weak Force and Electroweak Unification |
|
2.1.5 Spontaneous Symmetry Breaking and the Higgs Mechanism -- 2.1.6 EWK Symmetry Breaking and the Higgs Mechanism -- 2.2 Open Questions of the Standard Model -- 2.3 Introduction to Supersymmetry -- 2.3.1 Minimal Supersymmetric Standard Model -- References -- 3 LHC and the ATLAS Detector -- 3.1 The Large Hadron Collider -- 3.2 The ATLAS Detector -- 3.2.1 The Inner Detector -- 3.2.2 The Calorimeters -- 3.2.3 The Muon Spectrometer -- 3.3 Particle Reconstruction and Identification -- 3.4 Trigger System -- References -- 4 HL-LHC Inner Detector Upgrade -- 4.1 Motivation for the Detector Upgrade |
|
4.2 Inner Tracker: ITk -- 4.3 Strips Read-Out System -- 4.4 HCC130 Testing -- 4.4.1 HCC130 Signals -- 4.4.2 Testing Setup -- 4.4.3 Description of the FPGA Code -- 4.4.4 Functional Tests of the HCC130 -- 4.4.5 Testing the Analog Monitor (AM) -- 4.5 HCC130 Irradiation -- 4.5.1 Motivation: Current Increase at Low Total Ionizing Dose -- 4.5.2 Facility and Setup -- 4.5.3 Registers and Voltages Monitored -- 4.5.4 Pre-irradiation Calibrations -- 4.5.5 Results -- 4.6 Future Improvements and Studies -- References -- 5 WpmZ Cross-Section Measurement at sqrts = 13 TeV -- 5.1 Cross Section Methodology |
|
6.2 Wino-Bino Interpretation -- 6.3 Higgsino Interpretation -- References -- 7 Search for Wino-Bino Production Decaying via WZ at sqrts=13 TeV -- 7.1 Signal Signature -- 7.2 Simplified Model Framework -- 7.3 Overview of Backgrounds -- 7.4 Data Set and MC Samples -- 7.5 Object and Event Selection -- 7.5.1 Object Selection -- 7.5.2 Motivation for mTmin -- 7.5.3 Event Selection -- 7.6 Background Estimation -- 7.6.1 WZ Background -- 7.6.2 Reducible Background Estimation -- 7.7 Uncertainties -- 7.8 Two Leptons and Jets Final State -- 7.8.1 Event Selection -- 7.8.2 Background Modeling -- 7.8.3 Results |
| Summary |
This thesis discusses searches for electroweakly produced supersymmetric partners of the gauge and the Higgs bosons (gauginos and higgsinos) decaying to multiple leptons, using pp collisions at sqrt(s) = 13 TeV. The thesis presents an in-depth study of multiple searches, as well as the first 13 TeV cross section measurement for the dominant background in these searches, WZ production. Two searches were performed using 36.1/fb of data: the gaugino search, which makes use of a novel kinematic variable, and the higgsino search, which produced the first higgsino limits at the LHC. A search using 139/fb of data makes use of a new technique developed in this thesis to cross check an excess of data above the background expectation in a search using a Recursive Jigsaw Reconstruction technique. None of the searches showed a significant excess of data, and limits were expanded with respect to previous results. These searches will benefit from the addition of luminosity during HL-LHC; however, the current detector will not be able to withstand the increase in radiation. Electronics for the detector upgrade are tested and irradiated to ensure their performance |
| Notes |
"Doctoral Thesis accepted by University of Pennsylvania, Philadelphia, USA." |
| Bibliography |
Includes bibliographical references |
| Notes |
Online resource; title from digital title page (viewed on January 15, 2021) |
| Subject |
Particles (Nuclear physics)
|
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Quantum field theory.
|
|
Statistics.
|
|
Elementary Particles
|
|
particle physics.
|
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statistics.
|
|
Particles (Nuclear physics)
|
|
Quantum field theory
|
|
Statistics
|
| Genre/Form |
Electronic books
|
| Form |
Electronic book
|
| ISBN |
9783030570163 |
|
3030570169 |
|
