Observation of the Higgs boson decay to a pair of tau leptons with the CMS detector

Sirunyan A., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., ...More

PHYSICS LETTERS B, vol.779, pp.283-316, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 779
  • Publication Date: 2018
  • Doi Number: 10.1016/j.physletb.2018.02.004
  • Title of Journal : PHYSICS LETTERS B
  • Page Numbers: pp.283-316
  • Keywords: CMS, Physics, Tau, Higgs, Observation, LHC, BROKEN SYMMETRIES, MODEL, SEARCHES, COLLISIONS, ROOT-S=7, MASSES


A 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.