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Search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at √s = 13 TeVSirunyan, A.M.Tumasyan, A.Adam, W.Ambrogi, F.Bergauer, T.Dragicevic, M.Erö, J.Escalante Del Valle, A.Frühwirth, R.Jeitler, M.Krammer, N.Lechner, L.Liko, D.Madlener, T.Mikulec, I.Pitters, F.M.Rad, N.Schieck, J.Schöfbeck, R.Spanring, M.Templ, S.Waltenberger, W.Wulz, C.-E.Zarucki, M.Chekhovsky, V.Litomin, A.Makarenko, V.Suarez Gonzalez, J.Darwish, M.R.De Wolf, E.A.Di Croce, D.Janssen, X.Kello, T.Lelek, A.Pieters, M.Rejeb Sfar, H.Van Haevermaet, H.Van Mechelen, P.Van Putte, S.Van Remortel, N.Blekman, F.Bols, E.S.Chhibra, S.S.D’Hondt, J.De Clercq, J.Lontkovskyi, D.Lowette, S.Marchesini, I.Moortgat, S.Morton, A.Hadron-Hadron scattering (experiments)Lepton productionTau PhysicsResults are reported from a search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at s = 13 TeV. The data sample corresponds to an integrated luminosity of 33.2 fb−1 recorded by the CMS experiment at the LHC in 2016. The search exploits τ leptons produced in both W boson and heavy-flavor hadron decays. No significant excess above the expected background is observed. An upper limit on the branching fraction ℬ(τ → 3μ) of 8.0 × 10−8 at 90% confidence level is obtained, with an expected upper limit of 6.9 × 10−8. [Figure not available: see fulltext.] © 2021, The Author(s).Springer Science and Business Media Deutschland GmbH2021Articlehttps://rdlopen.rawdatalibrary.net/r/ebyu/13231https://doi.org/10.1007/jhep01(2021)1631029-8479enJournal of High Energy Physicsinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/13231