Search for vector-like quark pair production in final states with leptons and boosted Higgs bosons at s=13 TeV\sqrt{s}=13~\mathrm{TeV}

Collaboration
2016
16 pages
Report number:
  • CMS-PAS-B2G-16-011
Experiments:

Citations per year

201620172018201920201820
Abstract:
We present a search for pair-produced vector-like top partners (``T quark'') using data from pp collisions at a center-of-mass energy of s=13 TeV\sqrt{s}= 13~\mathrm{TeV} that were recorded with the CMS detector in the 2015 data-taking period. The search is carried out in the lepton+jets channel and is most sensitive for final states in which at least one T quark decays to a top quark and a Higgs boson. Since the final decay products tend to be collimated in the detector, jet-substructure techniques are used to identify boosted Higgs boson decays to bbb\overline{b}. No deviation from the Standard Model (SM) background prediction is observed in the data and upper 95%95\% confidence level (CL) exclusion limits on the TTˉ\mathrm{T\bar{T}} production cross section are calculated for multiple branching fraction scenarios of the T quark. Assuming a branching fraction of 100%100\% for the TtH\mathrm{T}\rightarrow \mathrm{tH} decay, T quark masses below 860 GeV (870 GeV expected) can be excluded.
Note:
  • Preliminary results
  • Data
  • p p: scattering
  • p p: colliding beams
  • quark: postulated particle
  • quark: vector particle
  • quark: decay
  • quark: pair production
  • Higgs particle: hadronic decay
  • Higgs particle: boosted particle
  • jet: bottom