Measurements of the HLT performance of displaced muons using Cosmics data

This note presents the performance of a dedicated displaced standalone muon reconstruction at the High Level Trigger in cosmics data recorded with the CMS detector in 2016. The results are presented as a function of the impact parameter of the offline reconstructed muon. A double muon trigger based on this muon reconstruction has been developed for the search of long-lived particles decaying into dimuons with 2018 data. The trigger relies only on information from the muon detectors to allow sensitivity to decays beyond the inner tracking detector.