CERN Accelerating science

ATLAS Note
Report number ATLAS-CONF-2013-108
Title Evidence for Higgs Boson Decays to the $\tau^+\tau^-$ Final State with the ATLAS Detector
Corporate Author(s) The ATLAS collaboration
Imprint 28 Nov 2013. - mult. p.
Note All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2013-108
Subject category Detectors and Experimental Techniques
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords ATLAS ; Higgs ; tau ; Standard Model
Abstract A search for the Higgs boson with a mass of about $125$ GeV decaying into a pair of $\tau$ leptons is performed with a data sample of proton-proton collisions, corresponding to an integrated luminosity of $\mathcal{L}=20.3$ fb$^{-1}$, collected with the ATLAS detector at the LHC at a centre-of-mass energy of $\sqrt{s}=8$ TeV. Final states in all $\tau$ 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 $\mu = 1.4 ^{+0.5}_{-0.4}$. This is evidence for the existence of $H\rightarrow\tau^+\tau^-$ decays, consistent with the Standard Model expectation for a Higgs boson with $m_H=125$ GeV.
Copyright/License Preprint: (License: CC-BY-4.0)

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 Record created 2013-11-28, last modified 2021-04-18