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Search for top-quark partners with charge 5/3 in the same-sign dilepton final state
S Chatrchyan1, V Khachatryan1, A M Sirunyan1
1Yerevan Physics Institute, Yerevan, Armenia.
Abstract:
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 sqrt[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.
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