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arXiv 1301.0434hep-exhep-ph
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来自Belle的B_1和B_2的结果

Results for ϕ_1 and ϕ_2 from Belle

P. Vanhoefer

摘要:

我们总结了对CKM角α_1和α_2敏感的测量结果,这些测量结果是由Belle实验使用KEK非对称e^+e^-对撞机产生的4S共振下的772个\times 10^{6} $B\bar{B}$对的最终数据样本进行的。我们讨论了对γ_1敏感的衰变$B^{0}\to c\bar{c} K^{0}$、$D^{(*)+}D^{(*)-}$和对γ_2敏感的衰变$B \to π^{+} π^{-}$、$a_1{\pm}π^{\mp}$的CP不对称性.此外,我们还测量了$B^{0}\to ρ^0ρ^0$衰变的分支分数和衰变中的纵极化分数,并用$B\to ρρ$系统中的同位旋分析来约束$B^{0}\to ρ^0ρ^0$ 2。

英文摘要:

We present a summary of measurements sensitive to the CKM angles ϕ_1 and ϕ_2, performed by the Belle experiment using the final data sample of 772 \times 10^{6} $B\bar{B}$ pairs at the Υ(4S) resonance produced at the KEK asymmetric e^+e^- collider. We discuss CP asymmetries from the decays $B^{0}\to c\bar{c} K^{0}$, $D^{(*)+}D^{(*)-}$ which are sensitive to ϕ_1 and from $B \to π^{+} π^{-}$, $a_1{\pm}π^{\mp}$ being sensitive to ϕ_2. Furthermore the measurement of the branching fraction of $B^{0}\to ρ^0ρ^0$ decays and fraction of longitudinal polarization in this decay is presented and used to constrain ϕ_2 with an isospin analysis in the $B\to ρρ$ system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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