Search for Supersymmetry and kinematic endpoint measurement in final states with two tau leptons with the ATLAS detector at the LHC [Elektronische Ressource] / Carolin Zendler. Mathematisch-Naturwissenschaftliche Fakultät

Search for Supersymmetry and kinematicendpoint measurement in final states withtwo tau leptons with the ATLAS detectorat the LHCDissertationzurErlangung des Doktorgrades (Dr. rer. nat.)derMathematisch-Naturwissenschaftlichen Fakult¨atderRheinischen Friedrich-Wilhelms-Universit¨at Bonnvorgelegt vonCarolin ZendlerausHeilbronnBonn 2011Angefertigt mit Genehmigung der Mathematisch-Naturwissenschaftlichen Fakult¨at derRheinischen Friedrich-Wilhelms-Universita¨t Bonn1. Gutachter: Prof. Dr. Klaus Desch2. Gutachter: Prof. Dr. Jochen DingfelderTag der Promotion: 11.08.2011Erscheinungsjahr: 2011AbstractDiscovery prospects for Supersymmetry in final states with at least two tau leptons and largemissing transverse energy are evaluated for LHC proton-proton collisions measured with theATLAS detector. In a first study based on Monte Carlo simulation, a Supersymmetry signalselection is developed for fully hadronic, semileptonic and fully leptonic di-tau decays in eventspproducedinproton-protoncollisionswithacenter-of-massenergyof s=10TeV. Theprospectsof measuring the kinematic endpoint of the di-tau invariant mass distribution assuming an in-R1tegrated luminosity of Ldt=1fb are evaluated for different mSUGRA scenarios along withthediscoveryreach. Inasecondstudy, asearchforSupersymmetryinthefullyhadronicchannelR1is performed, using Ldt=35pb of ATLAS data collected with proton-proton collisions atpth ths=7TeV between June 24 and October 29 2010.