Search for lepton flavor-violating decay modes B0→ K*0τ±ℓ∓ (ℓ = e, μ) 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%3A10510989" target="_blank" >RIV/00216208:11320/25:10510989 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=75qpRrkOo6" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=75qpRrkOo6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP08(2025)184" target="_blank" >10.1007/JHEP08(2025)184</a>

Result language
angličtina
Original language name
Search for lepton flavor-violating decay modes B0→ K*0τ±ℓ∓ (ℓ = e, μ) with hadronic B-tagging at Belle and Belle II
Original language description
We present the results of a search for the charged-lepton-flavor violating decays B0 -> K*0 tau +/-& ell;-/+, where & ell;-/+ is either an electron or a muon. The results are based on 365 fb-1 and 711 fb-1 datasets collected with the Belle II and Belle detectors, respectively. We use an exclusive hadronic B-tagging technique, and search for a signal decay in the system recoiling against a fully reconstructed B meson. We find no evidence for B0 -> K*0 tau +/-& ell;-/+ decays and set upper limits on the branching fractions in the range of (2.9-6.4)x10-5 at 90% confidence level.
Czech name
—
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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