Search for New Heavy Charged Bosons and Measurement of High-Mass Drell-Yan Production in Proton—Proton Collisions

Description

This book presents two analyses, the first of which involves the search for a new heavy charged gauge boson, a so-called W' boson. This new gauge boson is predicted by some theories extending the Standard Model gauge group to solve some of its conceptual problems. Decays of the W' boson in final states with a lepton (ℓ± = e± , µ±) and the corresponding (anti-)neutrino are considered. Data collected by the ATLAS experiment in 2015 at a center of mass energy of √s =13 TeV is used for the analysis. In turn, the second analysis presents a measurement of the double-differential cross section of the process pp->Z/gamma^* + X -> l^+l^- + X, including a gamma gamma induced contribution, at a center of mass energy of sqrt{s} = 8 TeV. The measurement is performed in an invariant mass region of 116 GeV to 1500 GeV as a function of invariant mass and absolute rapidity of the l^+l^-- pair, and as a function of invariant mass and pseudorapidity separation of the l^+l^-- pair. The data analyzed was recorded by the ATLAS experiment in 2012 and corresponds to an integrated luminosity of 20.3/fb. It is expected that the measured cross sections are sensitive to the PDFs at very high values of the Bjorken-x scaling variable, and to the photon structure of the proton. Front Matter ....Pages i-xiv Preamble (Markus Zinser)....Pages 1-4 Front Matter ....Pages 5-5 Theory Foundations (Markus Zinser)....Pages 7-38 Theoretical Predictions and Simulation (Markus Zinser)....Pages 39-44 Front Matter ....Pages 45-45 The Large Hadron Collider (Markus Zinser)....Pages 47-51 The ATLAS Experiment (Markus Zinser)....Pages 53-72 Particle Reconstruction and Identification in ATLAS (Markus Zinser)....Pages 73-88 Front Matter ....Pages 89-89 Motivation (Markus Zinser)....Pages 91-93 Analysis Strategy (Markus Zinser)....Pages 95-99 Analysis (Markus Zinser)....Pages 101-153 Statistical Interpretation (Markus Zinser)....Pages 155-171 Conclusion and Outlook (Markus Zinser)....Pages 173-175 Front Matter ....Pages 177-177 Motivation (Markus Zinser)....Pages 179-182 Analysis Strategy (Markus Zinser)....Pages 183-185 Analysis of the Electron Channel (Markus Zinser)....Pages 187-212 Electron Channel Cross Section Measurement (Markus Zinser)....Pages 213-234 Muon Channel Cross Section (Markus Zinser)....Pages 235-238 Results and Interpretation (Markus Zinser)....Pages 239-258 Conclusion and Outlook (Markus Zinser)....Pages 259-261 Summary (Markus Zinser)....Pages 263-264 Back Matter ....Pages 265-391