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 / Belle And Belle Ii, C., 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, M., Ayad, R., Babu, V., Baghel, N. k., Bahinipati, S., Bambade, P., Banerjee, Sw., Bansal, S., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 111:1(2025), pp. 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

Gabrielli, A.;Ganiev, E.;Gaudino, G.;Ghosh, D.;Giordano, R.;Gobbo, B.;Graziani, E.;Johnson, A.;Mancinelli, G.;Manfredi, R.;Mantovano, M.;Martini, A.;Merola, M.;Park, H.;Park, J.;Park, K.;Raiz, S.;Serrano, J.;Soffer, A.;Veronesi, M.;Yuan, J.;
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.
2025
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/3121654
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