{"arxiv_id":"1607.02050","title":"Scalar versus fermionic top partner interpretations of $t\\bar t + E_T^{\\rm miss}$ searches at the LHC","abstract":"We assess how different ATLAS and CMS searches for supersymmetry in the $t\\bar t + E_T^{\\rm miss}$ 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 $m_T\\approx 850$ 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.","primary_cat":"hep-ph","cross_cats":["hep-ex"],"submitted_at":"2016-07-07T15:39:43+00:00","latest_version":2,"source":"arxiv","source_label":"arXiv","source_url":null,"has_pdf":true,"has_source":false,"verdict":"CONDITIONAL","confidence":"MODERATE","one_line_summary":"LHC Run 1 stop searches select fermionic top-partner events with nearly the same efficiency as stop events, so stop simplified-model limit maps transfer and exclude top-partner masses up to about 850 GeV.","novelty_score":5.0,"correctness_risk":"medium","formal_verification":"none","upvotes":0,"downvotes":0,"pith_score":0.0,"inbound_count":9,"_links":{"html":"https://pith.science/paper/1607.02050","verdict":"/api/v1/verdicts/1607.02050"}}