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- W4226071657 abstract "A search for lepton-flavor-violating $Zto etau$ and $Ztomutau$ decays with $pp$ collision data recorded by the ATLAS detector at the LHC is presented. This analysis uses 139 fb$^{-1}$ of Run 2 $pp$ collisions at $sqrt{s}=13$ TeV and is combined with the results of a similar ATLAS search in the final state in which the $tau$-lepton decays hadronically, using the same data set as well as Run 1 data. The addition of leptonically decaying $tau$-leptons significantly improves the sensitivity reach for $Ztoelltau$ decays. The $Ztoelltau$ branching fractions are constrained in this analysis to $mathcal{B}(Zto etau)<7.0times10^{-6}$ and $mathcal{B}(Zto mutau)<7.2times10^{-6}$ at 95% confidence level. The combination with the previously published analyses sets the strongest constraints to date: $mathcal{B}(Zto etau)<5.0times10^{-6}$ and $mathcal{B}(Zto mutau)<6.5times10^{-6}$ at 95% confidence level." @default.
- W4226071657 created "2022-05-05" @default.
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