Please use this identifier to cite or link to this item: https://hdl.handle.net/1783.1/115958
Search for Lepton-Flavor Violation in Z -Boson Decays with τ Leptons with the ATLAS Detector
| Author |
The ATLAS Collaboration
Lie, Ki 
Prokofiev, Kirill
Xiang, Jianhuan Yang, Tianyi |
|---|---|
| Issue Date | 2021 |
| Source | Physical Review Letters, v. 127, (27), Decmber 2021, article number 271801 |
| Abstract | 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. © 2021 CERN. |
| Publisher | Amer Physical Soc |
| DOI | 10.1103/PhysRevLett.127.271801 |
| ISSN | 0031-9007 |
| Language | English |
| Type | Article |
| Access |
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