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Measurement of time-dependent $$CP$$ violation parameters in $$B^{0} to K^{0}_{S}K^{0}_{S}K^{0}_{S}$$ decays at Belle

Belleでの$$B^{0} to K^{0}_{S}K^{0}_{S}K^{0}_{S}$$崩壊における時間依存$$CP$$の破れのパラメータ測定

Kang, K. H.*; 谷田 聖   ; Belle Collaboration*; 他204名*

Kang, K. H.*; Tanida, Kiyoshi; Belle Collaboration*; 204 of others*

We measure the time-dependent $$C!P$$ violation parameters in $$B^{0} to K^{0}_{S}K^{0}_{S}K^{0}_{S}$$ decays using $$772 times 10^6$$ $$B {mkern 1.5muoverline{mkern-1.5mu B mkern-0.1mu}mkern 0.1mu}$$ pairs collected at the $$Upsilon (4S)$$ resonance with the Belle detector at the KEKB asymmetric-energy $$e^+ e^-$$ collider. The obtained mixing-induced and direct $$C!P$$ asymmetries are $$-0.71 pm 0.23~{rm(stat)} pm 0.05~{rm(syst)}$$ and $$0.12 pm 0.16~{rm(stat)} pm 0.05~{rm(syst)}$$, respectively. These values are consistent with the Standard Model predictions. The significance of $$C!P$$ violation differs from zero by 2.5 standard deviations.

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パーセンタイル:20.63

分野:Astronomy & Astrophysics

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