Search for Lepton-Flavor Violation in Z -Boson Decays with τ Leptons with the ATLAS Detector
No hay miniatura disponible
Archivos
Fecha
2021-12-31
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
American Physical Society
Nombre de Curso
Licencia CC
Attribution 4.0 International
CC BY 4.0
Deed
Licencia CC
https://creativecommons.org/licenses/by/4.0/
Resumen
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.
Notas
Indexación: Scopus.
Palabras clave
Tellurium compounds, ATLAS detectors, Branching fractions, Confidence levels, Data set, Final state, Lepton flavour violations, Lepton-flavor, Z Bosons
Citación
Physical Review Letters, Volume 127, Issue 27, 31 December 2021, Article number 271801
DOI
10.1103/PhysRevLett.127.271801