Search for CP violation in D(s)+ → KS0K-π+π+ decays using triple and quadruple products

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510984" target="_blank" >RIV/00216208:11320/25:10510984 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8G-HdWN2Ql" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8G-HdWN2Ql</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP04(2025)036" target="_blank" >10.1007/JHEP04(2025)036</a>

Result language
angličtina
Original language name
Search for CP violation in D(s)+ → KS0K-π+π+ decays using triple and quadruple products
Original language description
We perform the first search for CP violation in D-(s)(+) -> (KSK-)-K-0 pi(+)pi(+) decays. We use a combined data set from the Belle and Belle II experiments, which study e(+)e(-) collisions at center-of-mass energies at or near the (sic)(4S) resonance. We use 980 fb(-1) of data from Belle and 428 fb(-1) of data from Belle II. We measure six CP-violating asymmetries that are based on triple products and quadruple products of the momenta of final-state particles, and also the particles' helicity angles. We obtain a precision at the level of 0.5% for D-(s)(+) -> (KSK-)-K-0 pi(+)pi(+) decays, and better than 0.3% for D-(s)(+) -> (KSK-)-K-0 pi(+)pi(+) decays. No evidence of CP violation is found. Our results for the triple-product asymmetries are the most precise to date for singly-Cabibbo-suppressed D+ decays. Our results for the other asymmetries are the first such measurements performed for charm decays.
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
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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