Search for K+ decays into the π+e+e-e+e- final state
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476201" target="_blank" >RIV/00216208:11320/23:10476201 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=k2Ehp_vkX0" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=k2Ehp_vkX0</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2023.138193" target="_blank" >10.1016/j.physletb.2023.138193</a>
Alternative languages
Result language
angličtina
Original language name
Search for K+ decays into the π+e+e-e+e- final state
Original language description
The first search for ultra-rare K+decays into the π+e+e-e+e-final state is reported, using a dataset collected by the NA62 experiment at CERN in 2017-2018. An upper limit of 1.4x10-8at 90% CL is obtained for the branching ratio of the K+RIGHTWARDS ARROWπ+e+e-e+e-decay, predicted in the Standard Model to be (7.2 +-0.7) x10-11. Upper limits at 90% CL are obtained at the level of 10-9for the branching ratios of two prompt decay chains involving pair-production of hidden-sector mediators: K+RIGHTWARDS ARROWπ+aa, a RIGHTWARDS ARROWe+e-and K+RIGHTWARDS ARROWπ+S, SRIGHTWARDS ARROWAA, ARIGHTWARDS ARROWe+e-.
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
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
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
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ISSN
0370-2693
e-ISSN
1873-2445
Volume of the periodical
846
Issue of the periodical within the volume
846
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
9
Pages from-to
138193
UT code for WoS article
001158120600001
EID of the result in the Scopus database
2-s2.0-85172931208