Search for Lepton-Flavor-Violating τ Decays to a Lepton and an Invisible Boson at Belle II
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476873" target="_blank" >RIV/00216208:11320/23:10476873 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=wcFTp.Krbv" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=wcFTp.Krbv</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.130.181803" target="_blank" >10.1103/PhysRevLett.130.181803</a>
Alternative languages
Result language
angličtina
Original language name
Search for Lepton-Flavor-Violating τ Decays to a Lepton and an Invisible Boson at Belle II
Original language description
We search for lepton-flavor-violating tau- -> e-alpha and tau- -> mu-alpha decays, where alpha is an invisible spin-0 boson. The search uses electron-positron collisions at 10.58 GeV center-of-mass energy with an integrated luminosity of 62.8 fb-1, produced by the SuperKEKB collider and collected with the Belle II detector. We search for an excess in the lepton-energy spectrum of the known tau- -> e- nu over bar e nu tau and tau- -> mu- nu over bar mu nu tau decays. We report 95% confidence-level upper limits on the branching-fraction ratio Bo tau- -> e-alpha thorn =Bo tau- -> e-nu over bar e nu tau thorn in the range o1.1-9.7 thorn x 10-3 and on Bo tau- -> mu- alpha thorn =Bo tau- -> mu- nu over bar mu nu tau thorn in the range o0.7-12.2 thorn x 10-3 for alpha masses between 0 and 1.6 GeV=c2. These results provide the most stringent bounds on invisible boson production from tau decays.
Czech name
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Czech description
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Classification
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
Result continuities
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)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Letters
ISSN
0031-9007
e-ISSN
1079-7114
Volume of the periodical
130
Issue of the periodical within the volume
18
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
181803
UT code for WoS article
000992568900010
EID of the result in the Scopus database
2-s2.0-85158915684