We measure the time-integrated CP asymmetry in D0→KS0KS0 decays reconstructed in e+e-→cc¯ 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∗+→D0π+ decay, which determines the charm flavor at production time. A control sample of D0→K+K- decays is used to correct for production and detection asymmetries. The result, (-1.4±1.3(stat)±0.1(syst))%, is consistent with previous determinations and with CP symmetry.

Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., et al. (2025). Measurement of the time-integrated CP asymmetry in D0 → KS0 KS0 decays using Belle and Belle II data. PHYSICAL REVIEW D, 111(1), 012015-1-012015-11 [10.1103/PhysRevD.111.012015].

Measurement of the time-integrated CP asymmetry in D0 → KS0 KS0 decays using Belle and Belle II data

Di Canto A.;
2025

Abstract

We measure the time-integrated CP asymmetry in D0→KS0KS0 decays reconstructed in e+e-→cc¯ 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∗+→D0π+ decay, which determines the charm flavor at production time. A control sample of D0→K+K- decays is used to correct for production and detection asymmetries. The result, (-1.4±1.3(stat)±0.1(syst))%, is consistent with previous determinations and with CP symmetry.
2025
Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., et al. (2025). Measurement of the time-integrated CP asymmetry in D0 → KS0 KS0 decays using Belle and Belle II data. PHYSICAL REVIEW D, 111(1), 012015-1-012015-11 [10.1103/PhysRevD.111.012015].
Adachi, I.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Althubiti, N.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, V.; Aversano, ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1083826
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