- Typ
- Doktorarbeit
- Gebiet
- ATLAS
- Autor
- Carolin Zendler
- Titel
- Search for Supersymmetry and Kinematic Endpoint Measurement in Final States with Two Tau Leptons with the ATLAS Detector at the LHC
- Datum
- 2011-08
- Reportnummer
- BONN-IR-2011-12
- Kurzfassung
- Discovery prospects for Supersymmetry in final states with at least two tau leptons and large missing transverse energy are evaluated for LHC proton-proton collisions measured with the ATLAS detector. In a first study based on Monte Carlo simulation, a Supersymmetry signal selection is developed for fully hadronic, semileptonic and fully leptonic di-tau decays in events produced in proton-proton collisions with a center-of-mass energy of √s = 10 TeV. The prospects of measuring the kinematic endpoint of the di-tau invariant mass distribution assuming an integrated luminosity of L<sub>int.</sub> = 1 fb<sup>-1</sup> are evaluated for different mSUGRA scenarios along with the discovery reach. In a second study, a search for Supersymmetry in the fully hadronic channel is performed, using L<sub>int.</sub> = 35 pb<sup>-1</sup> of ATLAS data collected with proton-proton collisions at √s = 7 TeV between June 24<sup>th</sup> and October 29<sup>th</sup> 2010. Two events are observed, which is consistent with the Standard Model background expectation of N<sub>SM</sub> = 0.77±0.19<sup>(stat)</sup> <sub>-0.33</sub><sup>+0.55 (syst)</sup>. Interpreted in mSUGRA, limits on m<sub>0</sub> and m<sub>1/2</sub> are set for tan(β)=40, a positive higgsino mixing parameter and A<sub>0</sub> = 0 GeV or A<sub>0</sub> = -500 GeV. These limits constitute the first results of SUSY searches with tau leptons within the ATLAS experiment.
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