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arXiv 1606.09129hep-ph
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估计$r_{B}^{Dπ}$作为确定CKM角$γ$的输入

Estimating $r_{B}^{Dπ}$ as an input to the determination of the CKM angle $γ$

Matthew Kenzie, Maurizio Martinelli, Niels Tuning

摘要:

Cabibbo支持和Cabibbo抑制的$B\to Dπ$衰减幅度之间的干扰提供了对CKM角度$γ$的灵敏度。干扰幅度的相对大小是测定$γ$的重要因素。使用来自各种$B\to Dh$衰变的分支分数和$r_{B}^{DK}$的测量值,估计$B^+\to D^0π^+$和$B^+\to \bar{D}^0π^+$衰变的幅度比的大小为$r_{B}^{Dπ} = 0.0053 \pm 0.0007$。

英文摘要:

The interference between Cabibbo-favoured and Cabibbo-suppressed $B\to Dπ$ decay amplitudes provides sensitivity to the CKM angle $γ$. The relative size of the interfering amplitudes is an important ingredient in the determination of $γ$. Using branching fractions from various $B\to Dh$ decays, and the measured value for $r_{B}^{DK}$, the magnitude of the amplitude ratio of $B^+\to D^0π^+$ and $B^+\to \bar{D}^0π^+$ decays is estimated to be $r_{B}^{Dπ} = 0.0053 \pm 0.0007$.

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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