Search for a Heavy Neutrino in τ Decays at Belle

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476476" target="_blank" >RIV/00216208:11320/23:10476476 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ZhzoQJAStm" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ZhzoQJAStm</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.131.211802" target="_blank" >10.1103/PhysRevLett.131.211802</a>

Result language
angličtina
Original language name
Search for a Heavy Neutrino in τ Decays at Belle
Original language description
We report on a search for a heavy Majorana neutrino in the decays τ- RIGHTWARDS ARROW π-νh, νh RIGHTWARDS ARROW πlMINUS-OR-PLUS SIGN, l 1/4 e, μ.The results are obtained using the full data sample of 988 fb-1 collected with the Belle detector at theKEKB asymmetric energy eþe- collider, which contains 912 x 106 ττ pairs. We observe no significantsignal and set 95% CL upper limits on the couplings of the heavy right-handed neutrinos to theconventional standard model left-handed neutrinos in the mass range 0.2-1.6 GeV=c2. This is the firststudy of a mixed couplings of heavy neutrinos to τ leptons and light-flavor leptons.
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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