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

The CMS collaboration

Research output: Contribution to journalArticlepeer-review

188 Scopus citations


A measurement of the H→ττ 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 35.9fb−1. The H→ττ 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→ττ signal production cross section and branching fraction is 1.09−0.26 +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 8TeV 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 τ leptons by a single experiment.

Original languageEnglish
Pages (from-to)283-316
Number of pages34
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - 10 Apr 2018


  • CMS
  • Higgs
  • LHC
  • Observation
  • Physics
  • Tau


Dive into the research topics of 'Observation of the Higgs boson decay to a pair of τ leptons with the CMS detector'. Together they form a unique fingerprint.

Cite this