Search For Heavy Vector Bosons In Proton-proton Collisions At (?)=7Tev With The ATLAS Experiment

The Standard Model (SM) of particle physics has been very sucessful in its agreement vith experimental observations. Together with the Glashow-Weinberg-Salam theory of eletroweak interactions and the quantum chromodynamics theory of the strong interactions, it describes all known forces in the nature except gravity. Although the SM has achieved many successes in describing and predicting the particle physics, there are a few problems which make SM not being able to serve as a final theory of nature. The spontaneous symmetry breaking predicts the present of the Higgs boson, which is not yet found. Even if the Higgs boson is discovered, questions still arise, such as what is the nature of dark matter, whether or not the fundamental particles in SM are themselves made of constituent parts, and how to expand the SM to include the gravity in a consistent way. The questions to the SM give a strong motivation to search for the physics beyond the Standard Model, hoping to be able to explain some of these questions, and also to give alternative explanations to the electroweak symmetry breaking in case the Higgs mechanism contradicts the experimental results.The ATLAS detector was built with the main purposes of discovery or exclusion of the Higgs boson, as well as search for new physics in proton-proton collisions delivered by the Large Hadron Collider. The design energy of LHC is for center-of-mass energy (?)=14TeV, with7TeV per beam. The starting of LHC is in stages with lower center-of-mass energy of (?)=7TeV in year2010and2011. The accumulated integrated luminosity is about5fb-1.This thesis presents the searches for new physics using the first～1fb-1data collected by ATLAS in2011. We search for Sequential Standard Model Z’ boson search via dimuon channel and the Extend Gauge Model W’boson and Low-Scale Technicolor Model ρT meson search via WZ�'evee channel. The thesis begins with an overview of the Standard Model of particle physics and the introduction of several new physics models in Chapter1. The experimental enviroment, the LHC and the ATLAS detector, with special attention given to the ATLAS muon detector, are described in Chapter2. In Chapter3and Chapter4, the detailed descriptions of W’/ρr�'WZ�'evee and Z’�'μμ search are presented, respectively. The conclusions of the searhes performed in this thesis is given in Chapter5.