Discovery potential for $T^{\prime }\to tZ$ in the trilepton channel at the LHC

Abstract

The LHC discovery potential of heavy top partners decaying into a top quark and a $Z$ boson is studied in the trilepton channel at $\sqrt{s}=13$ TeV. The clean multilepton final state allows to strongly reduce the background contaminations and to reconstruct the $T^{\prime }$ 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 $T^{\prime }$ 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.

18 pages, 9 figures, 6 tables. Matching published version

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Cited by in corpus (7)

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• Search for single production of a top quark partner via the $T\to th$ and $h\to W{W}^{\ast }$ channels at the LHC
• Probing tqZ anomalous couplings in the trilepton signal at the HL-LHC, HE-LHC and FCC-hh
• Broad toplike vector quarks at LHC and HL-LHC
• Search for pair production of the heavy vectorlike top partner in same-sign dilepton signature at the HL-LHC
• Single production of vector-like top partner decaying to $Wb$ in the leptonic channel at $ep$ colliders in the LHT model