Search for the standard model Higgs boson produced in association with a vector boson and decaying into a tau pair in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math>collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>8</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:math>with the ATLAS detector

A search for the standard model Higgs boson produced in association with a vector boson with the decay $H\ensuremath{\rightarrow}\ensuremath{\tau}\ensuremath{\tau}$ is presented. The data correspond to $20.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of integrated luminosity from proton-proton collisions at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$ 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 $\ensuremath{\mu}=\ensuremath{\sigma}/{\ensuremath{\sigma}}_{\mathrm{SM}}$ for ${m}_{\mathrm{H}}=125\text{ }\text{ }\mathrm{GeV}$, is $\ensuremath{\mu}<5.6$ (3.7). The measured value of the signal strength is $\ensuremath{\mu}=2.3\ifmmode\pm\else\textpm\fi{}1.6$.

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