Search for b-hadron decays to long-lived particles in the CMS endcap muon detectorsстатьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 4 марта 2026 г.
Аннотация:A search for long-lived particles originating from the decay of b hadrons produced in proton-protoncollisions with a center-of-mass energy of 13 TeV at the LHC is presented. The analysis is performed on adataset 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 → KΦ), where the long-lived particle Φ decays to a pair of hadrons, are obtained for Φ masses of 0.3–3.0 GeV and Φ mean proper decay lengths in the range of 1–500 cm.