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Measurement of the time-integrated CP asymmetry in D0 → π0π0 decays at Belle II

Publication ,  Journal Article
Adachi, I; Ahn, Y; Akopov, N; Alghamdi, S; Alhakami, M; Aloisio, A; Althubiti, N; Amos, K; Angelsmark, M; Anh Ky, N; Antonioli, C; Asner, DM ...
Published in: Physical Review D
July 8, 2025
Published version (DOI)

We measure the time-integrated CP asymmetry, ACP, in D0 → π0π0 decays reconstructed in e+e− → cc̄ events collected by Belle II during 2019–2022. The data corresponds to an integrated luminosity of 428 fb−1. The D0 decays are required to originate from the flavor-conserving D*+ → D0π+ decay to determine the charm flavor at production time. Control samples of D0 → K−π+ decays, with or without an associated pion from a D*+ decay, are used to correct for detection asymmetries. The result, ACP(D0 → π0π0) = (0.30 ± 0.72 ± 0.20)%, where the first uncertainty is statistical and the second systematic, is consistent with CP symmetry.

Duke Scholars

Anselm G. Vossen
Author Anselm G. Vossen Physics

Published In

Physical Review D

DOI

10.1103/vg9c-xvdc

EISSN

2470-0029

ISSN

2470-0010

Publication Date

July 8, 2025

Volume

112

Issue

1

Start / End Page

1 / 12
 

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 → π0π0 decays at Belle II. Physical Review D, 112(1), 1–12. https://doi.org/10.1103/vg9c-xvdc
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 → π0π0 decays at Belle II.” Physical Review D 112, no. 1 (July 8, 2025): 1–12. https://doi.org/10.1103/vg9c-xvdc.
Adachi I, Ahn Y, Akopov N, Alghamdi S, Alhakami M, Aloisio A, et al. Measurement of the time-integrated CP asymmetry in D0 → π0π0 decays at Belle II. Physical Review D. 2025 Jul 8;112(1):1–12.
Adachi, I., et al. “Measurement of the time-integrated CP asymmetry in D0 → π0π0 decays at Belle II.” Physical Review D, vol. 112, no. 1, July 2025, pp. 1–12. Scopus, doi:10.1103/vg9c-xvdc.
Adachi I, Ahn Y, Akopov N, Alghamdi S, Alhakami M, Aloisio A, Althubiti N, Amos K, Angelsmark M, Anh Ky 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, De La Cruz-Burelo E, De La Motte SA, De Pietro G, de Sangro R, Destefanis M, Di Canto A, Dingfelder J, Doležal Z, Domínguez Jiménez I, Dong TV, Dorigo M, Dujany G, Ecker P, Epifanov D, Eppelt J, 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 → π0π0 decays at Belle II. Physical Review D. 2025 Jul 8;112(1):1–12.

Published In

Physical Review D

DOI

10.1103/vg9c-xvdc

EISSN

2470-0029

ISSN

2470-0010

Publication Date

July 8, 2025

Volume

112

Issue

1

Start / End Page

1 / 12