Search for the baryon number and lepton number violating decays τ − → Λπ− and τ − → Λ¯ π− at Belle II

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10494106" target="_blank" >RIV/00216208:11320/24:10494106 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=M.7zJwEyiH" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=M.7zJwEyiH</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.110.112003" target="_blank" >10.1103/PhysRevD.110.112003</a>

Result language
angličtina
Original language name
Search for the baryon number and lepton number violating decays τ − → Λπ− and τ − → Λ¯ π− at Belle II
Original language description
We present a search for the baryon number B and lepton number L violating decays τ- RIGHTWARDS ARROW Λπ- andτ- RIGHTWARDS ARROW Λ- π- produced from the eþe- RIGHTWARDS ARROW τþτ- process, using a 364 fb-1 data sample collected by the Belle IIexperiment at the SuperKEKB collider. No evidence of signal is found in either decay mode, which havejΔðB - LÞj equal to 2 and 0, respectively. Upper limits at 90% credibility level on the branching fractions ofτ- RIGHTWARDS ARROW Λπ- and τ- RIGHTWARDS ARROW Λ- π- are determined to be 4.7 x 10-8 and 4.3 x 10-8, respectively.
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
<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
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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