Search for Lepton-Flavor-Violating Decay Modes B0 → KS0τ∓ l± with Hadronic B Tagging at Belle and Belle II

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510175" target="_blank" >RIV/00216208:11320/25:10510175 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xYiCyhJ9h~" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xYiCyhJ9h~</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/yzvh-v3hm" target="_blank" >10.1103/yzvh-v3hm</a>

Result language
angličtina
Original language name
Search for Lepton-Flavor-Violating Decay Modes B0 → KS0τ∓ l± with Hadronic B Tagging at Belle and Belle II
Original language description
We present the first search for the lepton-flavor-violating decay modes B-0 -> K-S(0)tau(-/+) l(+/-) (l = mu. e) using the 711 and 365 fb(-1) data samples recorded by the Belle and Belle II detectors, respectively. We use a hadronic B-tagging technique to fully reconstruct a B meson and search for signal decays in the system recoiling against the tagged meson, considering t decays to either light leptons, one charged hadron, or one charged hadron and a neutral pion. We find no evidence for B-0 -> K-S(0)tau(-/+) l(+/-) decays and set 90% confidence level upper limits on the branching fractions in the range of [0.8, 3.6] x 10(-5).
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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

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