Abstract
We measure the branching fraction for the Cabibbo-suppressed decay D0→KS0KS0π+π− and search for CP violation via a measurement of the CP asymmetry ACP as well as the T-odd triple-product asymmetry aCPT. We use 922 fb−1 of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy e+e− collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel D0→KS0π+π−; the result is B(D0→KS0KS0π+π−)=[4.79±0.08(stat)±0.10(syst)±0.31(norm)]×10−4, where the first uncertainty is statistical, the second is systematic, and the third is from uncertainty in the normalization channel. We also measure ACP=[−2.51±1.44(stat)−0.10+0.11(syst)]%, and aCPT=[−1.95±1.42(stat)−0.12+0.14(syst)]%. These results show no evidence of CP violation.Received 16 July 2022Accepted 30 January 2023DOI:https://doi.org/10.1103/PhysRevD.107.052001Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBranching fractionElectroweak interactionPhysical SystemsCharmed mesonsMesonsPropertiesCP violationParticles & Fields
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