# Search for top-quark partners with charge 5/3 in the same-sign dilepton final state

CMS Collaboration; Chatrchyan, S; Khachatryan, V; Sirunyan, A M; et al; Chiochia, V; Kilminster, B; Robmann, P (2014). Search for top-quark partners with charge 5/3 in the same-sign dilepton final state. Physical Review Letters, 112(171801):online.

## 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 $19.5\text{ }\text{ }{\mathrm{fb}}^{$-${}1}$ and was collected at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$ 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.

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 $19.5\text{ }\text{ }{\mathrm{fb}}^{$-${}1}$ and was collected at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$ 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.

## Citations

44 citations in Web of Science®
32 citations in Scopus®

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Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics English 2014 19 Feb 2014 08:35 05 Apr 2016 17:37 American Physical Society 0031-9007 https://doi.org/10.1103/PhysRevLett.112.171801
Permanent URL: https://doi.org/10.5167/uzh-92183