Aad, G.ATLAS Collaboration,2016-10-192016-10-192012Physical Review Letters, 2012; 108(25):251801-1-251801-181079-71141079-7114http://hdl.handle.net/2440/101926A search for the decay of a light Higgs boson (120–140 GeV) to a pair of weakly interacting, long-lived particles in 1.94  fb⁻¹ of proton-proton collisions at √s = 7  TeV recorded in 2011 by the ATLAS detector is presented. The search strategy requires that both long-lived particles decay inside the muon spectrometer. No excess of events is observed above the expected background and limits on the Higgs boson production times branching ratio to weakly interacting, long-lived particles are derived as a function of the particle proper decay length.en© 2012 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.ATLAS CollaborationProtonsSpectrum AnalysisNuclear PhysicsMesonsParticle AcceleratorsModels, TheoreticalJournal article002013268710.1103/PhysRevLett.108.2518010003055687000042-s2.0-8486260836917488