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Measurement of decay-time dependent CP violation in B0→K0SK0SK0S using 2019--2021 Belle II data

MPS-Authors

Andricek,  L.
Max Planck Semiconductor Laboratory, Max Planck Society;

Ninkovic,  J.
Max Planck Semiconductor Laboratory, Max Planck Society;

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2209.09547.zip
(Preprint), 540KB

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Citation

Belle II Collaboration, Abudinén, F., Adachi, I., Adamczyk, K., Aggarwal, L., Ahlburg, P., et al. (in preparation). Measurement of decay-time dependent CP violation in B0→K0SK0SK0S using 2019--2021 Belle II data.


Cite as: https://hdl.handle.net/21.11116/0000-000F-AFF1-C
Abstract
We report a measurement of decay-time dependent $CP$-violating parameters in
$B^0 \rightarrow K^0_S K^0_S K^0_S$ decays. We use $(198.0 \pm 3.0) \times
10^6\ B\overline{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the
Belle II detector at the SuperKEKB asymmetric-energy $e^+e^-$ collider. The
observed mixing-induced and direct $CP$ violation parameters are $\mathcal{S} =
-1.86\ _{-0.46}^{+0.91}~{\rm (stat)} \pm 0.09~{\rm (syst)}$ and $\mathcal{A} =
-0.22\ _{-0.27}^{+0.30}~{\rm (stat)} \pm 0.04~{\rm (syst)}$, respectively.