Search for long-lived heavy neutral leptons decaying in the CMS muon detectors in proton-proton collisions at Formula Presented

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dc.contributor.authorHayrapetyan, A.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAndrejkovic, J.W.
dc.contributor.authorBergauer, T.
dc.contributor.authorChatterjee, S.
dc.contributor.authorDamanakis, K.
dc.date.accessioned2025-03-23T19:16:36Z
dc.date.available2025-03-23T19:16:36Z
dc.date.issued2024
dc.departmentSinop Üniversitesi
dc.description.abstractA search for heavy neutral leptons (HNLs) decaying in the CMS muon system is presented. A data sample is used corresponding to an integrated luminosity of Formula Presented of proton-proton collisions at Formula Presented, recorded at the CERN LHC in 2016-2018. Decay products of long-lived HNLs could interact with the shielding materials in the CMS muon system and create hadronic and electromagnetic showers detected in the muon chambers. This distinctive signature provides a unique handle to search for HNLs with masses below 4 GeV and proper decay lengths of the order of meters. The signature is sensitive to HNL couplings to all three generations of leptons. Candidate events are required to contain a prompt electron or muon originating from a vertex on the beam axis and a displaced shower in the muon chambers. No significant deviations from the standard model background expectation are observed. In the electron (muon) channel, the most stringent limits to date are set for HNLs in the mass range of 2.1-3.0 (1.9-3.3) GeV, reaching mixing matrix element squared values as low as Formula Presented. © 2024 CERN, for the CMS Collaboration.
dc.description.sponsorshipCouncil of Scientific and Industrial Research, India, CSIR
dc.description.sponsorshipDST
dc.description.sponsorshipFNRS
dc.description.sponsorshipCNRS
dc.description.sponsorshipNSC
dc.description.sponsorshipIN2P3
dc.description.sponsorshipUM
dc.identifier.doi10.1103/PhysRevD.110.012004
dc.identifier.issn2470-0010
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85199910657
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.110.012004
dc.identifier.urihttps://hdl.handle.net/11486/4158
dc.identifier.volume110
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.ispartofPhysical Review D
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_Scopus_20250323
dc.titleSearch for long-lived heavy neutral leptons decaying in the CMS muon detectors in proton-proton collisions at Formula Presented
dc.typeArticle

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