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Search for third-generation vector-like leptons in $pp$ collisions at $\sqrt{s} = 13\,\text{TeV}$ with the ATLAS detector

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arxiv 2303.05441 v3 pith:XMPOGZVL submitted 2023-03-09 hep-ex

ATLAS Collaboration This is my paper · ORCID
classification hep-ex
keywords leptonsvector-likemodelsearchatlascollisionsdetectorexcluded
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

A search for vector-like leptons in multilepton (two, three, or four-or-more electrons plus muons) final states with zero or more hadronic $\tau$-lepton decays is presented. The search is performed using a dataset corresponding to an integrated luminosity of 139 fb$^{-1}$ of proton$-$proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the LHC. To maximize the separation of signal and background, a machine-learning classifier is used. No excess of events is observed beyond the Standard Model expectation. Using a doublet vector-like lepton model, vector-like leptons coupling to third-generation Standard Model leptons are excluded in the mass range from 130 GeV to 900 GeV at the 95% confidence level, while the highest excluded mass is expected to be 970 GeV.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Freeze-in Production of Non-Abelian Millicharged Vector Dark Matter

    hep-ph 2025-12 conditional novelty 6.0 of 10

    A hidden SU(2) gauge sector broken to a massless dark photon can produce vector dark matter via freeze-in with portal couplings near 10^-7.

  2. The Two Scales of New Physics in Loop-Induced Higgs Couplings

    hep-ph 2024-12 conditional novelty 6.0 of 10

    A deviation in the loop-induced Higgs couplings hgg, hγγ, or hZγ caused solely by new vectorlike fermions implies an upper bound on the mass scale of new bosons needed to restore perturbativity and vacuum stability.

  3. Novel Multilepton Signatures from the Fermionic Portal to Vector Dark Matter

    hep-ph 2026-07 conditional novelty 5.0 of 10

    A topology-based six-muon search at the HL-LHC could probe vector-like muon dark-portal partners up to about 1.9 TeV.

  4. Single production of singlet vector-like leptons at the ILC

    hep-ph 2024-12 conditional novelty 4.0 of 10

    Projected 5-sigma discovery regions for singlet vector-like leptons at the 1 TeV ILC are derived, covering masses 300-700 GeV and coupling kappa down to about 0.026.

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