Search for Lepton-Flavor Violation in Z -Boson Decays with τ Leptons with the ATLAS Detector

(ATLAS Collaboration)

研究成果: Article査読

抄録

A search for lepton-flavor-violating Z→eτ and Z→μτ 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 s=13 TeV and is combined with the results of a similar ATLAS search in the final state in which the τ lepton decays hadronically, using the same data set as well as Run 1 data. The addition of leptonically decaying τ leptons significantly improves the sensitivity reach for Z→ℓτ decays. The Z→ℓτ branching fractions are constrained in this analysis to B(Z→eτ)<7.0×10-6 and B(Z→μτ)<7.2×10-6 at 95% confidence level. The combination with the previously published analyses sets the strongest constraints to date: B(Z→eτ)<5.0×10-6 and B(Z→μτ)<6.5×10-6 at 95% confidence level.

本文言語English
論文番号271801
ジャーナルPhysical Review Letters
127
27
DOI
出版ステータスPublished - 2021 12月 31

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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