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Título: | Search for A →μ+μ-Decays |
Autor: | LHCb Collaboration; García Martín, L.M.; Henry, L.; Jashal, B.; Martínez-Vidal, Fernando CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Remón Alepuz, Clara; Ruiz Vidal, Joan; Sánchez Mayordomo, Carlos CSIC | Fecha de publicación: | ene-2020 | Editor: | American Physical Society | Citación: | Physical Review Letters 124: 041801 (2020) | Resumen: | Searches are performed for both promptlike and long-lived dark photons, A, produced in proton-proton collisions at a center-of-mass energy of 13 TeV. These searches look for A→μ+μ-decays using a data sample corresponding to an integrated luminosity of 5.5 fb-1 collected with the LHCb detector. Neither search finds evidence for a signal, and 90% confidence-level exclusion limits are placed on the γ-A kinetic mixing strength. The promptlike A search explores the mass region from near the dimuon threshold up to 70 GeV and places the most stringent constraints to date on dark photons with 214<m(A)â‰740 MeV and 10.6<m(A)â‰30 GeV. The search for long-lived A→μ+μ-decays places world-leading constraints on low-mass dark photons with lifetimes O(1) ps. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.124.041801 | URI: | http://hdl.handle.net/10261/233294 | DOI: | 10.1103/PhysRevLett.124.041801 | Identificadores: | doi: 10.1103/PhysRevLett.124.041801 issn: 1079-7114 |
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282_LHCB_Search.pdf | 1,44 MB | Adobe PDF | Visualizar/Abrir |
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