Hayrapetyan, A.Makarenko, V.Tumasyan, A.Adam, W.Andrejkovic, J. W.Benato, L.Bergauer, T.2026-04-252026-04-2520262470-00102470-0029https://doi.org/10.1103/7ldn-snznhttps://hdl.handle.net/11486/8416A search for long-lived particles originating from the decay of b hadrons produced in proton-proton collisions with a center-of-mass energy of 13 TeV at the LHC is presented. The analysis is performed on a dataset recorded in 2018, corresponding to an integrated luminosity of 41.6 fb(-1). Interactions of the long-lived particles in the CMS endcap muon system would create hadronic or electromagnetic showers, producing clusters of detector hits. Selected events contain at least one such high-multiplicity cluster in the muon endcaps and require the presence of a displaced muon. The most stringent upper limits to date on the branching fraction B(B -> K Phi), where the long-lived particle Phi decays to a pair of hadrons, are obtained for Phi masses of 0.3-3.0 GeV and Phi mean proper decay lengths in the range of 1-500 cm.eninfo:eu-repo/semantics/openAccess#BAŞV!Article113110.1103/7ldn-snzn2-s2.0-105030632370Q1WOS:001691879200001Q10000-0003-4386-05640000-0002-3931-08450000-0002-9404-59330000-0001-7774-00990009-0003-0170-62080000-0002-7584-50380000-0002-7366-4225