Search for top quark partners with charge 5/3 in proton-proton collisions at √s=13 TeV


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Sirunyan A., Tumasyan A., Adam W., Asilar E., Bergauer T., Brandstetter J., ...More

Journal of High Energy Physics, vol.2017, no.8, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2017 Issue: 8
  • Publication Date: 2017
  • Doi Number: 10.1007/jhep08(2017)073
  • Journal Name: Journal of High Energy Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Beyond Standard Model, Exotics, Hadron-Hadron scattering (experiments), Top physics
  • Yıldız Technical University Affiliated: Yes

Abstract

A search for the production of heavy partners of the top quark with charge 5/3 (X5/3) decaying into a top quark and a W boson is performed with a data sample corresponding to an integrated luminosity of 2.3 fb−1, collected in proton-proton collisions at a center-of-mass energy of 13 TeV with the CMS detector at the CERN LHC. Final states with either a pair of same-sign leptons or a single lepton, along with jets, are considered. No significant excess is observed in the data above the expected standard model background contribution and an X5/3 quark with right-handed (left-handed) couplings is excluded at 95% confidence level for masses below 1020 (990) GeV. These are the first limits based on a combination of the same-sign dilepton and the single-lepton final states, as well as the most stringent limits on the X5/3 mass to date.[Figure not available: see fulltext.].