Search for a heavy resonance decaying to a top quark and a vector-like top quark at √s = 13 TeV

CMS Collaboration

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6 Citations (Scopus)

Abstract

A search is presented for massive spin-1 Z' resonances decaying to a top quark and a heavy vector-like top quark partner T. The search is based on a 2.6 fb-1 sample of proton-proton collisions at 13TeV collected with the CMS detector at the LHC. The analysis is optimized for final states in which the T quark decays to a W boson and a bottom quark. The focus is on all-jet final states in which both the W boson and the top quark decay into quarks that evolve into jets. The decay products of the top quark and of the W boson are assumed to be highly Lorentz-boosted and cannot be reconstructed as separate jets, but are instead reconstructed as merged, wide jets. Techniques for the identication of jet substructure and jet flavour are used to distinguish signal from background events. Several models for Z' bosons decaying to T quarks are excluded at 95% condence level, with upper limits on the cross section ranging from 0.13 to 10 pb, depending on the chosen hypotheses. This is the first search for a neutral spin-1 heavy resonance decaying to a top quark and a vector-like T quark in the all-hadronic final state.
Original languageEnglish
Article number053
Number of pages42
JournalJournal of High Energy Physics
Volume2017
Issue number9
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • Beyond Standard Model
  • Hadron-Hadron scattering (experiments)
  • Top physics

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