Search for the charged-lepton-flavor-violating decay Z → eμ in pp collisions at √s = 13 TeV with the ATLAS detector

0579585 - FZÚ 2024 RIV US eng J - Journal Article
Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2900 authors
Search for the charged-lepton-flavor-violating decay Z → eμ in pp collisions at √s = 13 TeV with the ATLAS detector.
Physical Review D. Roč. 108, č. 3 (2023), č. článku 032015. ISSN 2470-0010. E-ISSN 2470-0029
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * lepton: flavor: violation * mass spectrum: (electron muon)
OECD category: Particles and field physics
Impact factor: 5, year: 2022
Method of publishing: Open access

A search for the charged-lepton-flavor-violating process Z→eμZ→eμ is presented, using 139 fb−1−1 of s=13s ​=13 TeV pppp collision data collected by the ATLAS experiment at the LHC. An excess in the eμeμ invariant mass spectrum near the ZZ boson mass would be a striking signature of new physics. No excess is observed, and an upper limit B(Z→eμ)<2.62×10−7B(Z→eμ)<2.62×10−7 is placed on the branching fraction at 95% confidence level, which is the most stringent limit to date.
Permanent Link: https://hdl.handle.net/11104/0348400