Sirunyan A.M.; Tumasyan A.; Adam W.; Ambrogi F.; Bergauer T.; Dragicevic M.; Er� J.; Bahinipati p. ; et all.2025-02-17202113http://dx.doi.org/10.1007/JHEP01(2021)163https://idr.iitbbs.ac.in/handle/2008/3719Results are reported from a search for the lepton flavor violating decay ? ? 3? 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 ? 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 ?(? ? 3?) 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).enHadron-Hadron scattering (experiments); Lepton production; Tau PhysicsArticle