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- W2247673578 abstract "Using the full data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider, we present three recent measurements of time-dependent CP violation in B decays that are sensitive to potential new physics contributions and a measurement of branching fraction of the B0 → π0π0 decay. We studied B → ωK decays and measured the values of CP violation parameters in B0 → ωK0S to be AωK0S = 0.36 ± 0.19 ± 0.05 and SωK0S = +0.91 ± 0.32 ± 0.05, which gives the first evidence of CP violation in this decay. From the measurement of CP violation parameters in the B0 → η'K0 decay we obtain Sη'K0 = 0.68 ± 0.07 ± 0.03 and Aη'K0 = +0.03 ± 0.05 ± 0.04, which are the world's most precise values to date. We present the Belle first measurement of CP violation parameters in B0 → K0Sηγ decay, where we measure SK0Sηγ = -1.32 ± 0.77 ± 0.36 and AK0Sηγ = -0.48 ± 0.41 ± 0.07 (preliminary). Finally we present our preliminary measurement of the B0 → π0π0 branching fraction. We measure B(B0 → π0π0) = (0.89 ± 0.12 ± 0.10) × 10-6, with significantly improved sensitivity compared to previously available results." @default.
- W2247673578 created "2016-06-24" @default.
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- W2247673578 date "2015-07-30" @default.
- W2247673578 modified "2023-10-18" @default.
- W2247673578 title "CPviolation inBdecays at Belle" @default.
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- W2247673578 doi "https://doi.org/10.1088/1742-6596/631/1/012037" @default.
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