Measurement of the time-integrated CP asymmetry in D0 → π0π0 decays at Belle II

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510996" target="_blank" >RIV/00216208:11320/25:10510996 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=G~YLj6bs_I" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=G~YLj6bs_I</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/vg9c-xvdc" target="_blank" >10.1103/vg9c-xvdc</a>

Result language
angličtina
Original language name
Measurement of the time-integrated CP asymmetry in D0 → π0π0 decays at Belle II
Original language description
We measure the time-integrated CP asymmetry, A(CP), in D-0 -> pi(0)pi(0) decays reconstructed in e(+)e(-) -> c (c) over bar events collected by Belle II during 2019-2022. The data corresponds to an integrated luminosity of 428 fb(-1). The D-0 decays are required to originate from the flavor-conserving D*(+) -> D-0 pi(+) decay to determine the charm flavor at production time. Control samples of D-0 -> K-pi(+) decays, with or without an associated pion from a D*(+) decay, are used to correct for detection asymmetries. The result, A(CP) (D-0 -> pi(0)pi(0)) = (0.30 +/- 0.72 +/- 0.20)%, where the first uncertainty is statistical and the second systematic, is consistent with CP symmetry.
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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