Measurement of decay-time dependent CP violation in B⁰ → K⁰_S K⁰_S K⁰_S using 2019--2021 Belle II data

2022/09/20 by F. Abudinén, Belle II Collaboration, Abudinén, F. +688
Medicine · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Medical Imaging Techniques and Applications #Particle Detector Development and Performance #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.2209.09547

openalex publication_date 2022/09/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report a measurement of decay-time dependent CP-violating parameters in B⁰ → K⁰_S K⁰_S K⁰_S decays. We use (198.0 ± 3.0) × 10⁶ BB pairs collected at the Υ(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 S = -1.86 _-0.46^+0.91~\rm (stat) ± 0.09~\rm (syst) and A = -0.22 _-0.27^+0.30~\rm (stat) ± 0.04~\rm (syst), respectively.

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