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Measurement of the time-integrated CP asymmetry in D0 → K0SK0S decays using opposite-side flavor tagging at Belle and Belle II

Publication ,  Journal Article
Adachi, I; Ahn, Y; Akopov, N; Alghamdi, S; Alhakami, M; Aloisio, A; Althubiti, N; Amos, K; Angelsmark, M; AnhKy, N; Antonioli, C; Asner, DM ...
Published in: Physical Review D
July 21, 2025
Published version (DOI)

We measure the time-integrated CP asymmetry in D0 → K0SK0S decays reconstructed in e+e- → c¯c events collected by the Belle and Belle II experiments. The corresponding data samples have integrated luminosities of 980 and 428 fb-1, respectively. To infer the flavor of the D0 meson, we exploit the correlation between the flavor of the reconstructed decay and the electric charges of particles reconstructed in the rest of the e+e− → c¯c event. This results in a sample which is independent from any other previously used at Belle or Belle II. The result, ACP(D0 → K0SK0S) =(1.3 ± 2.0 ± 0.2)%, where the first uncertainty is statistical and the second systematic, is consistent with previous determinations and with CP symmetry.

Duke Scholars

Anselm G. Vossen
Author Anselm G. Vossen Physics

Published In

Physical Review D

DOI

10.1103/8x1h-39dp

EISSN

2470-0029

ISSN

2470-0010

Publication Date

July 21, 2025

Volume

112

Issue

1
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Adachi, I., Ahn, Y., Akopov, N., Alghamdi, S., Alhakami, M., Aloisio, A., … Gaur, V. (2025). Measurement of the time-integrated CP asymmetry in D0 → K0SK0S decays using opposite-side flavor tagging at Belle and Belle II. Physical Review D, 112(1). https://doi.org/10.1103/8x1h-39dp
Adachi, I., Y. Ahn, N. Akopov, S. Alghamdi, M. Alhakami, A. Aloisio, N. Althubiti, et al. “Measurement of the time-integrated CP asymmetry in D0 → K0SK0S decays using opposite-side flavor tagging at Belle and Belle II.” Physical Review D 112, no. 1 (July 21, 2025). https://doi.org/10.1103/8x1h-39dp.
Adachi I, Ahn Y, Akopov N, Alghamdi S, Alhakami M, Aloisio A, et al. Measurement of the time-integrated CP asymmetry in D0 → K0SK0S decays using opposite-side flavor tagging at Belle and Belle II. Physical Review D. 2025 Jul 21;112(1).
Adachi, I., et al. “Measurement of the time-integrated CP asymmetry in D0 → K0SK0S decays using opposite-side flavor tagging at Belle and Belle II.” Physical Review D, vol. 112, no. 1, July 2025. Scopus, doi:10.1103/8x1h-39dp.
Adachi I, Ahn Y, Akopov N, Alghamdi S, Alhakami M, Aloisio A, Althubiti N, Amos K, Angelsmark M, AnhKy N, Antonioli C, Asner DM, Atmacan H, Aushev T, Aversano M, Ayad R, Babu V, Bae H, Baghel NK, Bahinipati S, Bambade P, Banerjee S, Barrett M, Bartl M, Baudot J, Baur A, Beaubien A, Becherer F, Becker J, Bennett JV, Bernlochner FU, Bertacchi V, Bertemes M, Bertholet E, Bessner M, Bettarini S, Bhuyan B, Bianchi F, Bilka T, Biswas D, Bobrov A, Bodrov D, Bondar A, Borah J, Boschetti A, Bozek A, Bračko M, Branchini P, Briere RA, Browder TE, Budano A, Bussino S, Campajola M, Cao L, Casarosa G, Cecchi C, Cheema P, Cheon BG, Chilikin K, Chin J, Chirapatpimol K, Cho HE, Cho K, Cho SJ, Choi SK, Choudhury S, Consigny I, Corona L, Cui JX, DeLaCruz-Burelo E, DeLaMotte SA, deMarino G, DePietro G, deSangro R, Destefanis M, DiCanto A, Dingfelder J, Doležal Z, DomínguezJiménez I, Dong TV, Dorigo M, Dujany G, Ecker P, Epifanov D, Farkas R, Feichtinger P, Ferber T, Fillinger T, Finck C, Finocchiaro G, Fodor A, Forti F, Fulsom BG, Gabrielli A, Gale A, Ganiev E, Garcia-Hernandez M, Garg R, Gaudino G, Gaur V. Measurement of the time-integrated CP asymmetry in D0 → K0SK0S decays using opposite-side flavor tagging at Belle and Belle II. Physical Review D. 2025 Jul 21;112(1).

Published In

Physical Review D

DOI

10.1103/8x1h-39dp

EISSN

2470-0029

ISSN

2470-0010

Publication Date

July 21, 2025

Volume

112

Issue

1