2740685 20250206151638.0 oai:cds.cern.ch:2740685 cerncds:FULLTEXT cerncds:atlas-conf Inspire 1821711 ATLAS-CONF-2020-051 eng ATLAS-COM-CONF-2020-068 The ATLAS collaboration Search for displaced leptons in $\sqrt{s} = 13$ TeV pp collisions with the ATLAS detector 2020 Geneva CERN 06 Oct 2020 mult. p All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2020-051 A search for charged leptons with large impact parameters using 139 fb$^{-1}$ of $\sqrt{s} = 13$ TeV $pp$ 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 0.1 ns lifetimes selectron, smuon and stau masses up to 720 GeV, 680 GeV, and 340 GeV are excluded, respectively, at 95% CL drastically improving on the previous best limits from LEP. CONF CERN CDS-Invenio WebSubmit SzGeCERN Particle Physics - Experiment SzGeCERN Conference talks on ATLAS CERN INTNOTE PRIVATLAS INTNOTEATLASPUBL CERN LHC ATLAS PH-EP ATLAS Collaboration superseded by CERN-EP-2020-205 2744332 http://cds.cern.ch/record/2738318 Original Communication (restricted to ATLAS) 2251226 513405 http://cds.cern.ch/record/2740685/files/ATLAS-CONF-2020-051.pdf Stamped by WebSubmit: 06/10/2020 elodie.deborah.resseguie@cern.ch lesya.anna.horyn@cern.ch n 202070 91 2718781 ATLAS-CONF-2020-051 moscow20201005 PUBLIC 000770104CER INTNOTEATLASPUBL Note