Search for the Standard Model Higgs boson produced in association with a vector boson and decaying into a tau pair in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

Abstract

A search for the Standard Model Higgs boson produced in association with a vector boson with the decay $H\to \tau \tau$ is presented. The data correspond to 20.3 fb${}^{-1}$ of integrated luminosity from proton-proton collisions at $\sqrt{s}=8$ TeV recorded by the ATLAS experiment at the LHC during 2012. The data agree with the background expectation, and 95% confidence-level upper limits are placed on the cross section of this process. The observed (expected) limit, expressed in terms of the signal strength $\mu =\sigma /{\sigma }_{\mathrm{SM}}$ for $m_{\mathrm{H}}=125GeV$, is $\mu <$ 5.6 (3.7). The measured value of the signal strength is $\mu =2.3\pm 1.6$.

18 pages (+author list: 34 pages total), 9 figures, 7 tables. Submitted to Phys.Rev.D. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2014-01/

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• Heterogeneous Graph Neural Network for Identifying Hadronically Decayed Tau Leptons at the High Luminosity LHC
• Higgs-Precision Constraints on Colored Naturalness
• The three jewels in the crown of the LHC