Search for direct pair production of scalar top quarks in the single- and dilepton channels in proton-proton collisions at √s = 8 TeV

CMS Collaboration

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Abstract

Results are reported from a search for the top squark t~1, the lighter of the two supersymmetric partners of the top quark. The data sample corresponds to 19.7 fb-1 of proton-proton collisions at √s = 8TeV collected with the CMS detector at the LHC. The search targets t~1 → bχ~1± and t~1 → t(∗)χ~01 decay modes, where χ~1± and χ~01 are the lightest chargino and neutralino, respectively. The reconstructed final state consists of jets, b jets, missing transverse energy, and either one or two leptons. Leading backgroundsare determined from data. No signicant excess in data is observed above the expectationfrom standard model processes. The results exclude a region of the two-dimensional plane of possible t~1 and χ~01 masses. The highest excluded t~1 and χ~01masses are about 700 GeV and 250 GeV, respectively.
Original languageEnglish
Article number27
Number of pages49
JournalJournal of High Energy Physics
Volume2016
Issue number7
DOIs
Publication statusPublished - 2016
Externally publishedYes

Keywords

  • Hadron-Hadron scattering (experiments)
  • Supersymmetry
  • top squark

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