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Search for Supersymmetry with R-parity violation in leptonic final states with the ATLAS detector at 13 TeV center-of-mass energy
Supersymmetry with R-parity violation, where the lightest supersymmetric particle can decay into Standard Model particles is an attractive target for collider-based searches for physics beyond the Standard Model. In this thesis, four-lepton events are studied as a possible signature of R-parity-viol...
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Lenguaje: | eng |
Publicado: |
2016
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2127500 |
Sumario: | Supersymmetry with R-parity violation, where the lightest supersymmetric particle can decay into Standard Model particles is an attractive target for collider-based searches for physics beyond the Standard Model. In this thesis, four-lepton events are studied as a possible signature of R-parity-violating supersymmetry, using proton- proton collision events collected by the ATLAS experiment at $\sqrt{s}$ = 13 TeV. The event selection is optimized for events with low-mass collimated lepton pairs, and the viability of estimating the important $t\bar{t}Z$ background process from $t\bar{t}\gamma$ events is shown. Using the optimized selection, it is found that pair-produced charginos with masses above 1 TeV can be discovered with $3\sigma$ significance in $10~\text{fb}^{-1}$ of data. |
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