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arXiv 1008.4083hep-phhep-ex
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$D^0 \to K_S π^+ π^-$和$D^0 \to π^0 K^+ K^-$ Dalitz图振幅中的相对相位

Relative phases in Dalitz plot amplitudes for $D^0 \to K_S π^+ π^-$ and $D^0 \to π^0 K^+ K^-$

Bhubanjyoti Bhattacharya, Jonathan L. Rosner

摘要:

$D$介子衰变为轻赝标介子$P$和轻矢量介子$V$衰变为两个赝标介子的振幅的相对相位将导致三体Dalitz图上的特征干涉。这些相位可以与味道对称处理的预测进行比较,味道对称处理从对$D \to PV$衰减速率的拟合中提取贡献幅度及其相对相位。先前发现$D^0 \to K^- π^+ π^0$和$D^0 \to π^+ π^- π^0$病例具有良好的一致性。本文研究了衰变$D^0 \to K_S π^+ π^-$和$D^0 \to π^0 K^+ K^-$,发现它们之间存在着不一致性,并对这种不一致性提出了一些建议.

英文摘要:

Relative phases of amplitudes for $D$ meson decays to a light pseudoscalar meson $P$ and a light vector meson $V$ decaying to two pseudoscalar mesons will lead to characteristic interferences on the three-body Dalitz plot. These phases may be compared with predictions of a flavor-symmetric treatment which extracts contributing amplitudes and their relative phases from a fit to $D \to PV$ decay rates. Good agreement was found previously for the cases of $D^0 \to K^- π^+ π^0$ and $D^0 \to π^+ π^- π^0$. The present work is devoted to the decays $D^0 \to K_S π^+ π^-$ and $D^0 \to π^0 K^+ K^-$, for which agreement is not found. Several suggestions are offered for this discrepancy.

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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