Abstract
We assess how different ATLAS and CMS searches for supersymmetry in the \( t\overline{t}+{E}_T^{\mathrm{miss}} \) final state at Run 1 of the LHC constrain scenarios with a fermionic top partner and a dark matter candidate. We find that the efficiencies of these searches in all-hadronic, 1-lepton and 2-lepton channels are quite similar for scalar and fermionic top partners. Therefore, in general, efficiency maps for stop-neutralino simplified models can also be applied to fermionic top-partner models, provided the narrow width approximation holds in the latter. Owing to the much higher production cross-sections of heavy top quarks as compared to stops, masses up to m T ≈ 850 GeV can be excluded from the Run 1 stop searches. Since the simplified-model results published by ATLAS and CMS do not extend to such high masses, we provide our own efficiency maps obtained with CheckMATE and MadAnalysis 5 for these searches. Finally, we also discuss how generic gluino/squark searches in multi-jet final states constrain heavy top partner production.
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Kraml, S., Laa, U., Panizzi, L. et al. Scalar versus fermionic top partner interpretations of \( t\overline{t}+{E}_T^{\mathrm{miss}} \) searches at the LHC. J. High Energ. Phys. 2016, 107 (2016). https://doi.org/10.1007/JHEP11(2016)107
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DOI: https://doi.org/10.1007/JHEP11(2016)107