A search is presented for pair production of heavy vector-like T and B quarks in proton-proton collisions at √ s = 13 TeV. The data sample corresponds to an integrated luminosity of 35.9 fb−1 , collected with the CMS detector at the CERN LHC in 2016. Pair production of T quarks would result in a wide range of final states, since vector-like T quarks of charge 2e/3 are predicted to decay to bW, tZ, and tH. Likewise, vector-like B quarks are predicted to decay to tW, bZ, and bH. Three channels are considered, corresponding to final states with a single lepton, two leptons with the same sign of the electric charge, or at least three leptons. The results exclude T quarks with masses below 1140–1300 GeV and B quarks with masses below 910–1240 GeV for various branching fraction combinations, extending the reach of previous CMS searches by 200–600 GeV

The CMS collaboration., Sirunyan, A.M., Tumasyan, A. et al. Search for vector-like T and B quark pairs in final states with leptons at Search for vector-like T and B quark pairs in final states with leptons at √s
TeV. J. High Energ. Phys. 2018, 177 (2018). https://doi.org/10.1007/JHEP08(2018)177