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arXiv · 1502.07177

A search for high-mass resonances decaying to $τ^{+}τ^{-}$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

ATLAS Collaboration
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Abstract

A search for high-mass resonances decaying into $τ^{+}τ^{-}$ final states using proton-proton collisions at $\sqrt{s}= 8$ TeV produced by the Large Hadron Collider is presented. The data were recorded with the ATLAS detector and correspond to an integrated luminosity of 19.5-20.3 fb$^{-1}$. No statistically significant excess above the Standard Model expectation is observed; 95% credibility upper limits are set on the cross section times branching fraction of $Z^{\prime}$ resonances decaying into $τ^+τ^-$ pairs as a function of the resonance mass. As a result, $Z^{\prime}$ bosons of the Sequential Standard Model with masses less than 2.02 TeV are excluded at 95% credibility. The impact of the fermionic couplings on the $Z^{\prime}$ acceptance is investigated and limits are also placed on a $Z^{\prime}$ model that exhibits enhanced couplings to third-generation fermions.

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ATLAS Collaboration. 2015-11-11. A search for high-mass resonances decaying to $τ^{+}τ^{-}$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector. https://doi.org/10.1007/jhep07(2015)157

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