We measure the time-integrated CP asymmetry in D0 → K 0S K 0S decays reconstructed in e+e− → cc̄ 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*+ → D0 π+ 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→KS0KS0 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→KS0KS0 decays using Belle and Belle II data

Branchini, P.
Membro del Collaboration Group
;
Budano, A.
Membro del Collaboration Group
;
Bussino, S.
Membro del Collaboration Group
;
De Pietro, G.
Membro del Collaboration Group
;
Laurenza, M.
Membro del Collaboration Group
;
Martellini, C.
Membro del Collaboration Group
;
Martini, A.
Membro del Collaboration Group
;
2025-01-01

Abstract

We measure the time-integrated CP asymmetry in D0 → K 0S K 0S decays reconstructed in e+e− → cc̄ 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*+ → D0 π+ 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→KS0KS0 decays using Belle and Belle II data. PHYSICAL REVIEW D, 111(1), 012015-1-012015-11 [10.1103/physrevd.111.012015].
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/11590/511316
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 1
social impact