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Search for lepton-flavor violation in Z-boson decays with tau leptons with the ATLAS detector.
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SYSNO ASEP 0552879 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Search for lepton-flavor violation in Z-boson decays with tau leptons with the ATLAS detector. Author(s) Aad, G. (FR)
Abbott, B. (US)
Abbott, D.C. (US)
Chudoba, Jiří (FZU-D) RID, ORCID
Hejbal, Jiří (FZU-D) RID, ORCID
Hladík, Ondřej (FZU-D) ORCID
Jačka, Petr (FZU-D) ORCID
Kepka, Oldřich (FZU-D) RID, ORCID
Kroll, Jiří (FZU-D) ORCID
Kupčo, Alexander (FZU-D) RID, ORCID
Latoňová, Věra (FZU-D) ORCID
Lokajíček, Miloš (FZU-D) RID, ORCID
Lysák, Roman (FZU-D) RID, ORCID
Marčišovský, Michal (FZU-D) RID, ORCID
Mikeštíková, Marcela (FZU-D) RID, ORCID
Němeček, Stanislav (FZU-D) RID, ORCID
Penc, Ondřej (FZU-D) ORCID
Šícho, Petr (FZU-D) RID, ORCID
Staroba, Pavel (FZU-D) RID, ORCID
Svatoš, Michal (FZU-D) RID, ORCID
Taševský, Marek (FZU-D) RID, ORCIDNumber of authors 2881 Article number 271801 Source Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 127, č. 27 (2021)Number of pages 20 s. Language eng - English Country US - United States Keywords ATLAS ; CERN LHC Coll ; Z0: branching ratio: upper limit ; sensitivity Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LTT17018 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CERN-CZ II - 90104 - Fyzikální ústav AV ČR, v. v. i. Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000754272800005 EID SCOPUS 85123457439 DOI 10.1103/PhysRevLett.127.271801 Annotation A search for lepton-flavor-violating Z→eτZ o e auZ→eτ and Z→μτZ omu auZ→μτ decays with pppppp collision data recorded by the ATLAS detector at the LHC is presented. This analysis uses 139 fb−1^{-1}−1 of Run 2 pppppp collisions at s=13sqrt{s}=13s =13 TeV and is combined with the results of a similar ATLAS search in the final state in which the τ auτ-lepton decays hadronically, using the same data set as well as Run 1 data. The addition of leptonically decaying τ auτ-leptons significantly improves the sensitivity reach for Z→ℓτZ oell auZ→ℓτ decays. The Z→ℓτZ oell auZ→ℓτ branching fractions are constrained in this analysis to B(Z→eτ)<7.0×10−6mathcal{B}(Z o e au)<7.0 imes10^{-6}B(Z→eτ)<7.0×10−6 and B(Z→μτ)<7.2×10−6mathcal{B}(Z o mu au)<7.2 imes10^{-6}B(Z→μτ)<7.2×10−6 at 95% confidence level. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0328232
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