Search for a vector-like quark decaying to a top quark and a W boson

Collaboration
2018
Report number:
  • CMS-PAS-B2G-17-018
Experiments:

Citations per year

20182020202220242024401
Abstract:
A search is presented for single production of vector-like quarks (VLQs) in proton-proton collisions at s=13 TeV\sqrt{s} = 13~\mathrm{TeV} recorded with the CMS experiment at the LHC. The analyzed data sample corresponds to an integrated luminosity of 35.9 fb135.9~\mathrm{fb}^{-1}. The analysis focuses on the VLQ decay into a top quark and a W boson with one muon or electron in the final state. The mass of the VLQ candidates is reconstructed from identified b quark jets, as well as highly Lorentz boosted hadronic W boson and top quark decays. No significant deviation from the standard model background expectation is observed. Exclusion limits at 95%95\% confidence level are set on the production cross section times branching fraction as a function of the VLQ mass, which range from 0.3 pb0.3~\mathrm{pb} for a VLQ mass of 700 GeV700~\mathrm{GeV} down to 0.03 pb0.03~\mathrm{pb} for 1800 GeV1800~\mathrm{GeV}.
Note:
  • Preliminary results
  • Data
  • p p: colliding beams
  • top: single production
  • W: associated production
  • W: leptonic decay
  • W: boosted particle
  • jet: bottom
  • p p: scattering
  • quark: postulated particle
  • quark: vector particle