Yetkin, Elif Aslı2020-11-062020-11-062018-04-101873-24450370-2693https://hdl.handle.net/11411/2481https://doi.org/10.1016/j.physletb.2018.02.004A measurement of the H -> tau tau signal strength is performed using events recorded in proton-proton collisions by the CMS experiment at the LHC in 2016 at a center-of-mass energy of 13TeV. The data set corresponds to an integrated luminosity of 35.9 fb(-1). The H -> tau tau signal is established with a significance of 4.9 standard deviations, to be compared to an expected significance of 4.7 standard deviations. The best fit of the product of the observed H -> tau tau signal production cross section and branching fraction is 1.09(-0.2)(6+0.27) times the standard model expectation. The combination with the corresponding measurement performed with data collected by the CMS experiment at center-of-mass energies of 7 and 8 TeV leads to an observed significance of 5.9 standard deviations, equal to the expected significance. This is the first observation of Higgs boson decays to tau leptons by a single experiment. (c) 2018 The Author(s). Published by Elsevier B.V.eninfo:eu-repo/semantics/openAccessCMSPhysicsTauHiggsObservationLHCArticle2-s2.0-8504766657310.1016/j.physletb.2018.02.004Q1WOS:000429098900036