Search for third-generation vector-like leptons in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications, T.M. Carter, R.Y. Gonzalez Andana, A. Hasib, M.P. Heath, S. Palazzo, V.A. Parrish, E.A. Pender, E.P. Takeva, N. Themistokleous, E.M. Villhauer, E. Zaid

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A search for vector-like leptons in multilepton (two, three, or four-or-more
electrons plus muons) final states with zero or more hadronic τ -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.
Original languageEnglish
Article number118
Pages (from-to)1-48
Number of pages48
Journal Journal of High Energy Physics
Volume2023
Issue number7
DOIs
Publication statusPublished - 13 Jul 2023

Keywords / Materials (for Non-textual outputs)

  • Beyond Standard Model
  • Hadron-Hadron Scattering
  • Tau Physics

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