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- W2019976110 abstract "We present recent measurements of time-dependent CP asymmetries in two neutral B decay modes: B0 → η'K0 and B0 → ωK°S. The measured values of mixing-induced (sin 2ϕ1eff) and direct CP violation parameters are: Sη'Ko = +0.68 ± 0.07stat ± 0.03syst, Aη'K0 = +0.03 ± 0.05stat ± 0.04syst and SωK0S = +0.91 ± 0.32stat ± 0.05syst, AωK0S = -0.36 ± 0.19stat ± 0.05syst, respectively. These results are fully consistent with the current world average of sin 2ϕ1 measured in b → cs transitions, and represent the most accurate measurements in these modes up-to- date. In addition, we present a new preliminary update on branching ratio measurement in B0 → π0π0 decay mode, the result of which: ℬ(B0 → π0π0) = (0.90 ± 0.12stat ± 0.10syst) × 10−6 represents an important ingredient in a ππSU(2) isospin analysis, used to experimentally extract ϕ2 angle from B → ππ measurements. To obtain CP violation parameters (ℬ(B0 → π0π0)) the final data set of 772 × 106 (751.5 × 106) B pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric e+e− collider in Japan (3.5 × 8.0GeV) is used." @default.
- W2019976110 created "2016-06-24" @default.
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- W2019976110 date "2014-11-26" @default.
- W2019976110 modified "2023-09-26" @default.
- W2019976110 title "CP violation measurements in B mesons at Belle" @default.
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- W2019976110 doi "https://doi.org/10.1088/1742-6596/556/1/012037" @default.
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