Search for Lepton Number and Flavor Violation in K+ and pi(0) Decays

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10439676" target="_blank" >RIV/00216208:11320/21:10439676 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Eg7S8ibC_~" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Eg7S8ibC_~</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.127.131802" target="_blank" >10.1103/PhysRevLett.127.131802</a>

Result language
angličtina
Original language name
Search for Lepton Number and Flavor Violation in K+ and pi(0) Decays
Original language description
Searches for the lepton number violating K+ -> pi(-) mu(+) e(+) decay and the lepton flavor violating K+ -> pi(-) mu(+) e(+) and pi(0) -> mu(-) e(+) decays are reported using data collected by the NA62 experiment at CERN in 2017-2018. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level: B(K+ -> pi(-) mu(+) e(+)) < 4.2 x 10(-11), B(K+ -> pi(+) mu(-) e(+)) < 6.6 x 10(-11) and B(pi(0) -> mu(-) e(+)) < 3.2 x 10(-)(10). These results improve by 1 order of magnitude over previous results for these decay modes.
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/LTT17018" target="_blank" >LTT17018: Getting new knowledge of the microworld using the CERN infrastructure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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