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A search for supersymmetry and universal extra dimensions in final states with three leptons and missing transverse momentum in 20.7 inverse femtobarns of 8 TeV pp collisions with the ATLAS detector

University of British Columbia

This dissertation presents a search for direct production of charginos and neutralinos in final states with three leptons and missing transverse momentum in 20.7 inverse femtobarns of 8 TeV (center of mass) proton-proton collisions delivered by the Large Hadron Collider and collected with the ATLAS detector. The Standard Model augmented with the minimal formulation of universal extra dimensions (MUED) is phenomenologically similar to supersymmetry. This search is also sensitive to MUED cascades characterized by the presence of n=1 Kaluza-Klein excitations of Standard Model W and Z bosons. No significant excess over Standard Model predictions is observed. The results are interpreted in the context of simplified supersymmetric models and MUED. New limits are set at the 95% confidence level on the parameter spaces of these models.

Text

2014-04-22

Attribution-NonCommercial-NoDerivs 2.5 Canada

http://hdl.handle.net/2429/46557

Physics

University of British Columbia

UBCV

http://creativecommons.org/licenses/by-nc-nd/2.5/ca/