Model-independent measurement of $D^0-\bar{D}^0 mixing in $D^0 \to K_S\pi^+\pi^-$ decays
Category: Physics / performance paper
Tags:
| Principal Authors | Angelo Di Canto, Guanda Gong, Longke Li, Wenbiao Yan, Ziping Zhang |
|---|---|
| Date | 2026-03-29 |
| Working group | Charm |
| Belle II Number | BELLE2-PUB-PH-2026-014 |
| Abstract | We perform a model-independent measurement of the $D^0$-$\overline{D}{}^0$ mixing parameters using samples of $e^+e^-$-collision data collected by the Belle and Belle II experiments that have integrated luminosities of $951\ \text{fb}^{-1}$ and $408\ \text{fb}^{-1}$, respectively. Approximately $2.05\times10^6$ neutral $D$ mesons are reconstructed in the $D^0\rightarrow K^0_{S}π^+π^-$ channel, with the neutral $D$ flavor tagged by the charge of the pion in the $D^{*+}\rightarrow D^0π^+$ decay. Assuming charge-parity symmetry, the mixing parameters are measured to be $ x = (4.0\pm1.7\pm0.4)\times 10^{-3} $ and $ y = (2.9\pm1.4\pm0.3)\times 10^{-3}$, where the first uncertainties are statistical and the second systematic. The results are consistent with previous determinations. |
| Link to LaTeX code | https://gitlab.desy.de/belle2/documents/BELLE2-PUB-PH-2026-014 |
| ArXiv | https://arxiv.org/abs/2410.22961 |
| Inspire | https://inspirehep.net/literature/2843831 |
| DOI | 10.1103/7p5s-f9qp |
| Reference | Phys.Rev.D 111, 112011 (2025) |
| Bibtex | @article{Belle:2024dux,
author = "Adachi, Ichiro and others",
collaboration = "Belle, Belle-II",
title = "{Model-independent measurement of D0-D{\textasciimacron}0 mixing parameters in D0{\textrightarrow}KS0{\ensuremath{\pi}}+{\ensuremath{\pi}}- decays at Belle and Belle II}",
eprint = "2410.22961",
archivePrefix = "arXiv",
primaryClass = "hep-ex",
reportNumber = "Belle II Preprint 2024-027; KEK Preprint 2024-27",
doi = "10.1103/7p5s-f9qp",
journal = "Phys. Rev. D",
volume = "111",
number = "11",
pages = "112011",
year = "2025"
}
|
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