UNSPECIFIED (2015) A search for high-mass resonances decaying to τ+ τ− in pp collisions at √s =8 TeV with the ATLAS detector. Journal of High Energy Physics, 2015 (7): 157. ISSN 1029-8479
1502.07177v1.pdf - Accepted Version
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art_3A10.1007_2FJHEP07_282015_29157.pdf - Published Version
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Abstract
A search for high-mass resonances decaying into τ+ τ− final states using proton-proton collisions at 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′ resonances decaying into τ+ τ− pairs as a function of the resonance mass. As a result, Z′ 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′ acceptance is investigated and limits are also placed on a Z′ model that exhibits enhanced couplings to third-generation fermions.