Search for a long-lived spin-0 mediator in b RIGHTWARDS ARROW s transitions at the Belle II experiment

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476867" target="_blank" >RIV/00216208:11320/23:10476867 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=buZDzIvd_6" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=buZDzIvd_6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.108.L111104" target="_blank" >10.1103/PhysRevD.108.L111104</a>

Result language
angličtina
Original language name
Search for a long-lived spin-0 mediator in b RIGHTWARDS ARROW s transitions at the Belle II experiment
Original language description
Additional spin-0 particles appear in many extensions of the standard model. We search for long-lived spin-0 particles S in B-meson decays mediated by a b -> s quark transition in e+e- collisions at the ϒ(4S) resonance at the Belle II experiment. Based on a sample corresponding to an integrated luminosity of 189 fb-1, we observe no evidence for signal. We set model-independent upper limits on the product of branching fractions B(B0 -> K*(892)0(-> K+ pi-)S) x B(S -> x+x-) and B(B+ -> K+S) x B(S -> x+x-), where x+x- indicates e+e-; mu+mu-; pi+ pi-, or K+K-, as functions of S mass and lifetime at the level of 10-7.
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
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OECD FORD branch
10300 - Physical sciences

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)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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