Search for third-generation vector-like leptons in pp collisions at p s = 13 TeV with the ATLAS detector Atlas Collaboration Aguilar Saavedra, Juan Antonio Rodríguez Chala, Mikael Beyond Standard Model Hadron-Hadron Scattering 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 -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 13TeV 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. 2023-10-27T10:40:35Z 2023-10-27T10:40:35Z 2023-07-13 journal article The ATLAS collaboration., Aad, G., Abbott, B. et al. Search for third-generation vector-like leptons in pp collisions at = 13 TeV with the ATLAS detector. J. High Energ. Phys. 2023, 118 (2023). [https://doi.org/10.1007/JHEP07(2023)118] https://hdl.handle.net/10481/85309 10.1007/JHEP07(2023)118 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional Springer Nature