We measure the time-integrated CP asymmetry in D0 → K0 S K0 S decays reconstructed in eþe− → c¯c events collected by the Belle and Belle II experiments. The corresponding data samples have integrated luminosities of 980 and 428 fb−1, respectively. The D0 decays are required to originate from the D þ → D0πþ decay, which determines the charm flavor at production time. A control sample of D0 → KþK− decays is used to correct for production and detection asymmetries. The result, ð−1.4 1.3ðstatÞ 0.1ðsystÞÞ%, is consistent with previous determinations and with CP symmetry.
Measurement of the time-integrated CP asymmetry in D0 → KS0 KS0 decays using Belle and Belle II data
A. Boschetti;S. Das;M. Destefanis;M. Maggiora;S. Marcello;S. Spataro;
2025-01-01
Abstract
We measure the time-integrated CP asymmetry in D0 → K0 S K0 S decays reconstructed in eþe− → c¯c events collected by the Belle and Belle II experiments. The corresponding data samples have integrated luminosities of 980 and 428 fb−1, respectively. The D0 decays are required to originate from the D þ → D0πþ decay, which determines the charm flavor at production time. A control sample of D0 → KþK− decays is used to correct for production and detection asymmetries. The result, ð−1.4 1.3ðstatÞ 0.1ðsystÞÞ%, is consistent with previous determinations and with CP symmetry.File in questo prodotto:
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