Bibliothèque de L'IMIST/CNRST

Introduction -- The Top Quark in the Context of the Standard Model -- Experimental Setup -- Objects and Processes -- General Analysis Strategy -- Measurement of σt¯t in 35 pb−1 of Data -- Measurement of σt¯t in 0.7 fb−1 of Data -- Future Extension to a Simultaneous Measurement of σt¯t and Rb -- Conclusions -- Separate Lepton Channel Fits in 35 pb−1 of Data -- Separate Lepton Channel Fits in 0.7 fb−1 of Data.

Before any kind of new physics discovery could be made at the LHC, a precise understanding and measurement of the Standard Model of particle physics' processes was necessary.   The book provides an introduction to top quark production in the context of the Standard Model and presents two such precise measurements of the production of top quark pairs in proton-proton collisions at a center-of-mass energy of 7 TeV that were observed with the ATLAS Experiment at the LHC. The presented measurements focus on events with one charged lepton, missing transverse energy and jets. Using novel and advanced analysis techniques as well as a good understanding of the detector, they constitute the most precise measurements of the quantity at that time.