| Simulation et détermination des quantités de matière du trajectomètre à rayonnement de transition de l'expérience ATLAS, étalonnage et alignement du détecteur avec des données cosmiques, et estimation des sections efficaces de production des désintégrations $W \to e\nu$ et $Z \to ee$ au LHC (2009) | |||||||||
Abstract | |||||||||
| The thesis has been completed within the ATLAS experiment at CERN, between 2006 and 2009, and has been done during the last years of construction of the LHC. After an introduction in particle physics, the thesis describes the ATLAS experiment with its inner detector and TRT. First, work on the TRT simulation has been done, concerning the geometry, as well as some estimates and measurements of the TRT weight. The detector performances are studied in a second part, to measure the electrons energy and momentum. Using some E/p distributions, a work on the determination of the amount of material and the residual misalignments is presented. In the third part, an estimate of the systematic uncertainty due to the acceptance corrections on the W→eν and Z→ee cross-section measurements is given. The last part contains an analysis of cosmic ray data in the TRT. The first results on the wire-by-wire alignment are presented. | |||||||||
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