A search for the standard model Higgs boson produced in association with a W or a Z boson and decaying to a pair of τ leptons is performed. A data sample of proton-proton collisions collected at √𝑠 = 13 TeV by the CMS experiment at the CERN LHC is used, corresponding to an integrated luminosity of 35.9 fb−1. The signal strength is measured relative to the expectation for the standard model Higgs boson, yielding μ = 2.5 + 1.4− 1.3. These results are combined with earlier CMS measurements targeting Higgs boson decays to a pair of τ leptons, performed with the same data set in the gluon fusion and vector boson fusion production modes. The combined signal strength is μ = 1.24 + 0.29− 0.27 (1.00 + 0.24− 0.23 expected), and the observed significance is 5.5 standard deviations (4.8 expected) for a Higgs boson mass of 125 GeV.
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The CMS collaboration., Sirunyan, A.M., Tumasyan, A. et al. Search for the associated production of the Higgs boson and a vector boson in proton-proton collisions at √𝑠 = 13 TeV via Higgs boson decays to τ leptons. J. High Energ. Phys. 2019, 93 (2019). https://doi.org/10.1007/JHEP06(2019)093