Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector

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dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbbott, D. C.
dc.contributor.authorATLAS Collaboration
dc.contributor.authorKuleshov, S.
dc.contributor.authorZamora Saa, J. A.
dc.date.accessioned2025-01-03T20:20:07Z
dc.date.available2025-01-03T20:20:07Z
dc.date.issued2023-08
dc.descriptionIndexación: Scopus
dc.description.abstractA search for pair-produced vector-like quarks using events with exactly one lepton (e or μ), at least four jets including at least one b-tagged jet, and large missing transverse momentum is presented. Data from proton–proton collisions at a centre-of-mass energy of s= 13 TeV , recorded by the ATLAS detector at the LHC from 2015 to 2018 and corresponding to an integrated luminosity of 139 fb - 1 , are analysed. Vector-like partners T and B of the top and bottom quarks are considered, as is a vector-like X with charge + 5 / 3 , assuming their decay into a W, Z, or Higgs boson and a third-generation quark. No significant deviations from the Standard Model expectation are observed. Upper limits on the production cross-section of T and B quark pairs as a function of their mass are derived for various decay branching ratio scenarios. The strongest lower limits on the masses are 1.59 TeV assuming mass-degenerate vector-like quarks and branching ratios corresponding to the weak-isospin doublet model, and 1.47 TeV (1.46 TeV) for exclusive T→ Zt (B/ X→ Wt) decays. In addition, lower limits on the T and B quark masses are derived for all possible branching ratios. © 2023, The Author(s).
dc.description.urihttps://link.springer.com/article/10.1140/epjc/s10052-023-11790-7
dc.identifier.citationEuropean Physical Journal C. Volume 83, Issue 8. August 2023. Article number 719
dc.identifier.doi10.1140/epjc/s10052-023-11790-7
dc.identifier.issn1434-6044
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/62899
dc.language.isoen
dc.publisherInstitute for Ionics
dc.rights.licenseAttribution 4.0 International Deed (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectBottom
dc.subjectCollisions
dc.subjectLepton (e or μ)
dc.subjectThe ATLAS detector
dc.subjectLHC
dc.subjectBottom Quarks
dc.subjectMass energy of s= 13 TeV
dc.titleSearch for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector
dc.typeArtículo
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