Model-independent measurement of 𝐷⁰−𝐷‾⁰mixing parameters in 𝐷⁰→𝐾⁰𝑆⁢𝜋⁺⁢𝜋⁻decays at Belle and Belle II

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hdl_148105.pdf (2.18 MB)
  (Published version)

Date

2025

Authors

Adachi, I.
Aggarwal, L.
Ahmed, H.
Aihara, H.
Akopov, N.
Aloisio, A.
Althubiti, N.
Anh Ky, N.
Asner, D.M.
Atmacan, H.

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Journal article

Citation

Physical Review D, 2025; 111(11):112011-1-112011-13

Statement of Responsibility

Belle and Belle II Collaborations

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DOI

10.1103/7p5s-f9qp

Abstract

We perform a model-independent measurement of the 𝐷0− ¯ 𝐷 0 mixing parameters using samples of 𝑒+⁢𝑒− -collision data collected by the Belle and Belle II experiments that have integrated luminosities of 951  fb−1 and 408  fb−1 , respectively. Approximately 2.05 ×106 neutral 𝐷 mesons are reconstructed in the 𝐷0 →𝐾0 S⁢𝜋+⁢𝜋− channel, with the neutral 𝐷 flavor tagged by the charge of the pion in the 𝐷*+ →𝐷0⁢𝜋+ decay. Assuming charge-parity symmetry, the mixing parameters are measured to be 𝑥 =(4.0 ±1.7 ±0.4) ×10−3 and 𝑦 =(2.9 ±1.4 ±0.3) ×10−3 , where the first uncertainties are statistical and the second systematic. The results are consistent with previous determinations.

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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3

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http://purl.org/au-research/grants/arc/DP200101792
 http://purl.org/au-research/grants/arc/DP210101900
 http://purl.org/au-research/grants/arc/DP210102831
 http://purl.org/au-research/grants/arc/DE220100462
 http://purl.org/au-research/grants/arc/LE210100098
 http://purl.org/au-research/grants/arc/LE230100085

Published Version

https://doi.org/10.1103/7p5s-f9qp

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Persistent link to this record

https://hdl.handle.net/2440/148105