Expected performance for displaced Lepton Jets: ATLAS trigger and reconstruction efficiency in LHC 2015 run.

Several models of physics beyond the Standard Model predict neutral particles that decay to final states consisting of collimated jets of light leptons and hadrons (so-called ``Lepton Jets''). These particles can also have a decay length comparable to, or even larger than, the LHC detectors' linear dimensions. This note presents the 2015 ATLAS trigger and reconstruction efficiencies expected for simulated displaced Lepton Jets, based on the Falkowsky-Ruderman-Volansky-Zupan BSM Higgs decay models.