A search for pair production of vector-like leptons coupling to first- and second-generation Standard Model leptons has been completed in ATLAS using the full Run 2 dataset and submitted to publication in JHEP. No significant excess above the Standard Model background expectation is observed and limits are set at 95% confidence level on the production cross-sections of vector-like electrons and muons as a function of the vector-like lepton mass, separately for SU(2) doublet and singlet scenarios. The resulting mass lower limits are 1220 GeV (1270 GeV) and 320 GeV (400 GeV) for vector-like electrons (muons) in the doublet and singlet scenarios, respectively. These are the most restrictive limits to date. IFAE members who contributed: Nazlim Agaras, Shalini Epari (analysis contact), Jack Harrison, Aurelio Juste, and Tamara Vazquez-Schroeder (paper editor).

Keep reading in Search for vector-like leptons coupling to first- and second-generation Standard Model leptons in pp collisions at s√=13 TeV with the ATLAS detector