Search for the lepton-flavor-violating τ- → e∓ℓ±ℓ- decays at Belle II

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510994" target="_blank" >RIV/00216208:11320/25:10510994 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=iuNsHD_ELU" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=iuNsHD_ELU</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP12(2025)169" target="_blank" >10.1007/JHEP12(2025)169</a>

Result language
angličtina
Original language name
Search for the lepton-flavor-violating τ- → e∓ℓ±ℓ- decays at Belle II
Original language description
We present the result of a search for the charged-lepton-flavor violating decays tau- -> e -/+& ell;+/-& ell;-, where & ell; is a muon or an electron, using a data sample with an integrated luminosity of 428 fb-1 recorded by the Belle II experiment at the SuperKEKB e+e- collider. The selection of e+e- -> tau+tau- events containing a signal candidate is based on an inclusive-tagging reconstruction and on a boosted decision tree to suppress background.Upper limits on the branching fractions between 1.3 and 2.5 x 10-8 are set at the 90% confidence level. These results are the most stringent bounds to date for four of the modes.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10300 - Physical sciences

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)