Search for the Lepton Flavor Violating Decays B+ → K+ τ± l∓ (l = e, μ) at Belle

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476472" target="_blank" >RIV/00216208:11320/23:10476472 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=E2IGgwTg~Y" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=E2IGgwTg~Y</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.130.261802" target="_blank" >10.1103/PhysRevLett.130.261802</a>

Result language
angličtina
Original language name
Search for the Lepton Flavor Violating Decays B+ → K+ τ± l∓ (l = e, μ) at Belle
Original language description
We present a search for the lepton flavor violating decays B+ -> K+ tau(+/-) l(-/+), with l = (e, mu), using the full data sample of 772 x 10(6) B (B) over bar pairs recorded by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode. We find no evidence for B-+/- -> K-+/- tau l decays and set upper limits on their branching fractions at the 90% confidence level in the (1 - 3) x 10(-5) range. The obtained limits are the world's best results.
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
—
OECD FORD branch
10300 - Physical sciences

Project
<a href="/en/project/GA22-18469S" target="_blank" >GA22-18469S: Studies of the Beyond Standard Model phenomena in the flavor sector with the Belle II Experiment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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