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.

Measurement of time-dependent CP asymmetries in decays at Belle and Belle II / 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., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Bambade, P., Banerjee, S., Barrett, M., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2026:1(2026). [10.1007/JHEP01(2026)134]

Measurement of time-dependent CP asymmetries in decays at Belle and Belle II

Campajola M.;De Nardo G.;Gaudino G.;Giordano R.;Merola M.;Mirra M.;Pardi S.;
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
Measurement of time-dependent CP asymmetries in decays at Belle and Belle II / 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., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Bambade, P., Banerjee, S., Barrett, M., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2026:1(2026). [10.1007/JHEP01(2026)134]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/1043095
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact