Discovery potential for T' → tZ in the trilepton channel at the LHC

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The LHC discovery potential of heavy top partners decaying into a top quark and a Z boson is studied in the trilepton channel at √s=13 TeV. The clean multilepton final state allows to strongly reduce the background contaminations and to reconstruct the T' mass. We show that a simple cut-and-count analysis probes the parameter space of a simplified model as efficiently as a dedicated multivariate analysis. The trilepton signature finally turns out to be as sensitive in the low T' mass region as the complementary channel with a fully hadronic top quark, and more sensitive in the large mass domain. The reinterpretation in terms of the top-Z-up anomalous coupling is shown.