Search for Top-Quark Partners with Charge 5/3 in the Same-Sign Dilepton Final State

CMS Collaboration

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A search for the production of heavy partners of the top quark with charge 5/3 is performed in events with a pair of same-sign leptons. The data sample corresponds to an integrated luminosity of 19.5 fb−1 and was collected at √s = 8 TeV by the CMS experiment. No significant excess is observed in the data above the expected background, and the existence of top-quark partners with masses below 800 GeV is excluded at a 95% confidence level, assuming they decay exclusively to tW. This is the first limit on these particles from the LHC, and it is significantly more restrictive than previous limits.
Original languageEnglish
Article number171801
Number of pages16
JournalPhysical Review Letters
Issue number17
Publication statusPublished - 2014
Externally publishedYes


  • Models
  • Vector-like quarks
  • Composite materials

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