We present a measurement of the time-dependent CP asymmetry in decays using a data set of 365 fb−1 recorded by the Belle II experiment and the final data set of 711 fb−1 recorded by the Belle experiment at the Υ(4S) resonance. The direct and mixing-induced time-dependent CP violation parameters C and S are determined along with two additional quantities, S+ and S−, defined in the two halves of the plane. The measured values are C = −0.17 ± 0.09 ± 0.04, S = −0.29 ± 0.11 ± 0.05, S+ = −0.57 ± 0.23 ± 0.10 and S− = 0.31 ± 0.24 ± 0.05, where the first uncertainty is statistical and the second systematic.

Abumusabh, M., Adachi, I., Aggarwal, L., Ahmed, H., Ahn, Y., Aihara, H., et al. (2026). Measurement of time-dependent CP asymmetries in B0->KSpi+pi-gamma decays at Belle and Belle II. JOURNAL OF HIGH ENERGY PHYSICS, 2026(1), 1-21 [10.1007/JHEP01(2026)134].

Measurement of time-dependent CP asymmetries in B0->KSpi+pi-gamma decays at Belle and Belle II

Di Canto A.;
2026

Abstract

We present a measurement of the time-dependent CP asymmetry in decays using a data set of 365 fb−1 recorded by the Belle II experiment and the final data set of 711 fb−1 recorded by the Belle experiment at the Υ(4S) resonance. The direct and mixing-induced time-dependent CP violation parameters C and S are determined along with two additional quantities, S+ and S−, defined in the two halves of the plane. The measured values are C = −0.17 ± 0.09 ± 0.04, S = −0.29 ± 0.11 ± 0.05, S+ = −0.57 ± 0.23 ± 0.10 and S− = 0.31 ± 0.24 ± 0.05, where the first uncertainty is statistical and the second systematic.
2026
Abumusabh, M., Adachi, I., Aggarwal, L., Ahmed, H., Ahn, Y., Aihara, H., et al. (2026). Measurement of time-dependent CP asymmetries in B0->KSpi+pi-gamma decays at Belle and Belle II. JOURNAL OF HIGH ENERGY PHYSICS, 2026(1), 1-21 [10.1007/JHEP01(2026)134].
Abumusabh, M.; Adachi, I.; Aggarwal, L.; Ahmed, H.; Ahn, Y.; Aihara, H.; Akopov, N.; Alghamdi, S.; Alhakami, M.; Amos, K.; Anh Ky, N.; Asner, D. M.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1084111
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