Measurement of B+ → τ+ντ branching fraction with a hadronic tagging method at Belle II

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10511001" target="_blank" >RIV/00216208:11320/25:10511001 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=rPFCLU5YTa" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=rPFCLU5YTa</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/dcwd-5tg4" target="_blank" >10.1103/dcwd-5tg4</a>

Result language
angličtina
Original language name
Measurement of B+ → τ+ντ branching fraction with a hadronic tagging method at Belle II
Original language description
We present a measurement of the branching fraction of B+ -> tau(+)nu(tau) decays using 387 +/- 6 x 10(6) (sic)(4S) collected between 2019 and 2022 withtheBelle II detector at theSuperKEKB e(+)e(-) collider. We reconstruct the accompanying B- meson using the hadronic tagging method, while B+ -> tau(+)nu(tau) candidates are identified in the recoil. We find evidence for B+ -> tau(+)nu(tau) decays at 3.0 standard deviations, including systematic uncertainties. Themeasured branching fraction is B(B+ -> tau(+)nu(tau)) = [1.24 +/- 0.41(stat) +/- 0.19(syst)] x 10(-4).
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
—
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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