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.
Measurement of the time-integrated CP asymmetry in D0 → KS0 KS0 decays using Belle and Belle II data
Bertacchi, V.;Bettarini, S.;Casarosa, G.;Corona, L.;Forti, F.;Massaccesi, L.;Mondal, S.;Rizzo, G.;Tenchini, F.;Zani, L.;
2025-01-01
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.File in questo prodotto:
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