Search for displaced leptons in √𝒔 = 13 TeV 𝒑𝒑 collisions with the ATLAS detector

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Colleges, School and Institutes


A search for charged leptons with large impact parameters using 139 fb−1 of √𝑠 = 13 TeV 𝑝𝑝 collision data from the ATLAS detector at the LHC is presented, addressing a long-standing gap in coverage of possible new physics signatures. Results are consistent with the background prediction. This search provides unique sensitivity to long-lived scalar supersymmetric lepton-partners (sleptons). For lifetimes of 0.1 ns, selectron, smuon and stau masses up to 720 GeV, 680 GeV, and 340 GeV are respectively excluded at 95% confidence level, drastically improving on the previous best limits from LEP.

Bibliographic note

Not yet published 24/09/2021. 29 pages in total, author list starting page 14, 2 figures, 1 table, submitted to PRL. All figures including auxiliary figures are available at


Original languageEnglish
JournalPhysical Review Letters
Publication statusAccepted/In press - 11 Jun 2021


  • hep-ex