A Search for High-Mass Resonances Decaying to $\tau^{+}\tau^{-}$ in $pp$ Collisions at $\sqrt{s}=8$ TeV with the ATLAS Detector

ATLAS Collaboration

Preprint/Report

PUBDB-2015-01449

A Search for High-Mass Resonances Decaying to $\tau^{+}\tau^{-}$ in $pp$ Collisions at $\sqrt{s}=8$ TeV with the ATLAS Detector

ATLAS Collaboration (Collaboration author)DESY*

2015

[10.3204/PUBDB-2015-01449]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2015-01449

Report No.: CERN-PH-EP-2015-018; arXiv:1502.07177

Abstract: A search for high-mass resonances decaying into $\tau^{+}\tau^{-}$ 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 $\tau^+\tau^-$ 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.

Note: OA

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