The ATLAS Collaboration,Aad, G.2016-11-162016-11-162014Journal of Instrumentation, 2014; 9(2):1-381748-02211748-0221http://hdl.handle.net/2440/102560A dedicated reconstruction algorithm to find decay vertices in the ATLAS muon spectrometer is presented. The algorithm searches the region just upstream of or inside the muon spectrometer volume for multi-particle vertices that originate from the decay of particles with long decay paths. The performance of the algorithm is evaluated using both a sample of simulated Higgs boson events, in which the Higgs boson decays to long-lived neutral particles that in turn decay to bbar b final states, and pp collision data at √s = 7 TeV collected with the ATLAS detector at the LHC during 2011.en© CERN 2014 for the benefit of the ATLAS collaboration, published under the terms of the Creative Commons Attribution 3.0 License by IOP Publishing Ltd and Sissa Medialab srl. Any further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation and DOI.Muon spectrometers; performance of high energy physics detectorsJournal article003001306210.1088/1748-0221/9/02/P020010003323144000362-s2.0-8497123138985749