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


Sirunyan A. M. , Tumasyan A., Adam W., Asilar E., Bergauer T., Brandstetter J., ...Daha Fazla

JOURNAL OF HIGH ENERGY PHYSICS, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: Konu: 8
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1007/jhep08(2017)073
  • Dergi Adı: JOURNAL OF HIGH ENERGY PHYSICS

Özet

A search for the production of heavy partners of the top quark with charge 5/3 (X-5/3) 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 X-5/3 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 X-5/3 mass to date.