Search for top quark partners with charge 5/3 in the same-sign dilepton and single-lepton final states in proton-proton collisions at root s=13 TeV



Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Dragicevic, M, Ero, J, Del Valle, A Escalante
et al (show 2265 more authors) (2019) Search for top quark partners with charge 5/3 in the same-sign dilepton and single-lepton final states in proton-proton collisions at root s=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2019 (3). 82-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>A search for the pair production of heavy fermionic partners of the top quark with charge 5/3 (<jats:italic>X</jats:italic> <jats:sub>5/3</jats:sub>) is performed in proton-proton collisions at a center-of-mass energy of 13 TeV with the CMS detector at the CERN LHC. The data sample analyzed corresponds to an integrated luminosity of 35.9 fb<jats:sup>−1</jats:sup>. The <jats:italic>X</jats:italic> <jats:sub>5/3</jats:sub> quark is assumed always to decay into a top quark and a W boson. Both the right-handed and left-handed <jats:italic>X</jats:italic> <jats:sub>5/3</jats:sub> couplings to the W boson are considered. Final states with either a pair of same-sign leptons or a single lepton are studied. No significant excess of events is observed above the expected standard model background. Lower limits at 95% confidence level on the <jats:italic>X</jats:italic> <jats:sub>5/3</jats:sub> quark mass are set at 1.33 and 1.30 TeV respectively for the case of right-handed and left-handed couplings to W bosons in a combination of the same-sign dilepton and single-lepton final states. </jats:p>

Item Type: Article
Uncontrolled Keywords: Beyond Standard Model, Hadron-Hadron scattering (experiments), Top physics
Depositing User: Symplectic Admin
Date Deposited: 09 May 2019 10:37
Last Modified: 17 Mar 2024 03:29
DOI: 10.1007/JHEP03(2019)082
Open Access URL: http://doi.org/10.1007/JHEP03(2019)082
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3040424