Measurement of the CP asymmetry in D+ → π+π0 decays at Belle II

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510177" target="_blank" >RIV/00216208:11320/25:10510177 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Vhc8eK0uBu" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Vhc8eK0uBu</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/3kqk-ldm4" target="_blank" >10.1103/3kqk-ldm4</a>

Result language
angličtina
Original language name
Measurement of the CP asymmetry in D+ → π+π0 decays at Belle II
Original language description
We measure the CP asymmetry in D+ -> pi(+)pi(0) decays reconstructed in e(+)e(-) collisions at the Belle II experiment using a dataset corresponding to an integrated luminosity of 428 fb(-1). A control sample of D+ -> pi K-+(S)0 decays is used to correct for detection and production asymmetries. The result A(CP) (D+ -> pi(+)pi(0)) = (-1.8 +/- 0.9 +/- 0.1)%, where the first uncertainty is statistical and the second systematic, is the most precise determination to date. It agrees with the prediction of CP symmetry from the standard model and with results of previous measurements.
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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