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 19.5fb-1 and was collected at s=8TeV 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. © 2014 CERN, for the CMS Collaboration.
Search for top-quark partners with charge 5/3 in the same-sign dilepton final state
Albergo, S.Membro del Collaboration Group
;Cappello, G.Membro del Collaboration Group
;Chiorboli, M.Membro del Collaboration Group
;Costa, S.Membro del Collaboration Group
;Potenza, R.Membro del Collaboration Group
;Tricomi, A.Membro del Collaboration Group
;Tuve, C.;
2014-01-01
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 19.5fb-1 and was collected at s=8TeV 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. © 2014 CERN, for the CMS Collaboration.File in questo prodotto:
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