Abstract
A search for charged leptons with large impact parameters using of 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, 680, and , respectively, are excluded at 95% confidence level, drastically improving on the previous best limits from LEP.
- Received 17 November 2020
- Revised 3 March 2021
- Accepted 11 June 2021
DOI:https://doi.org/10.1103/PhysRevLett.127.051802
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© 2021 CERN, for the ATLAS Collaboration