Evidence for Higgs Boson Decays to the τ+τ\tau^+\tau^- Final State with the ATLAS Detector

Collaboration
Nov 28, 2013
51 pages
Report number:
  • ATLAS-CONF-2013-108
Experiments:

Citations per year

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Abstract:
A search for the Higgs boson with a mass of about 125125 GeV decaying into a pair of τ\tau leptons is performed with a data sample of proton-proton collisions, corresponding to an integrated luminosity of L=20.3\mathcal{L}=20.3 fb1^{-1}, collected with the ATLAS detector at the LHC at a centre-of-mass energy of s=8\sqrt{s}=8 TeV. Final states in all τ\tau decay combinations (both hadronic and leptonic) are examined. The observed (expected) deviation from the background-only hypothesis corresponds to a significance of 4.1 (3.2) standard deviations, and the measured signal strength is μ=1.40.4+0.5\mu = 1.4 ^{+0.5}_{-0.4}. This is evidence for the existence of Hτ+τH\rightarrow\tau^+\tau^- decays, consistent with the Standard Model expectation for a Higgs boson with mH=125m_H=125 GeV.
Note:
  • Preliminary results
  • ATLAS
  • Higgs
  • tau
  • Standard Model
  • Higgs particle: leptonic decay
  • p p: scattering
  • ATLAS
  • experimental results
  • Higgs particle --> tau+ tau-