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arXiv 1203.6014hep-phhep-ex
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$D^0 \to K^0 K^- π^+$和$D^0 \to \bar K^0 K^+ π^-$ Dalitz图的Flavor-SU（3）检验

Flavor-SU(3) tests from $D^0 \to K^0 K^- π^+$ and $D^0 \to \bar K^0 K^+ π^-$ Dalitz plots

Bhubanjyoti Bhattacharya, Jonathan L. Rosner

备注：
6 pages, 1 figure. As published in Physics Letters B. arXiv admin note: substantial text overlap with arXiv:1104.4962
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摘要：

过程$D^0\to K^0 K^-π^+$和$D^0\to\ok K^+π^-$涉及中间矢量共振，其幅度和相位通过味SU（3）对称性彼此相关。这两个过程的Dalitz图可以揭示这种对称性在研究粲衰变中的有用性。直到今年，关于这一进程的唯一可用数据来自BaBar协作组织2002年的一份会议报告，但现在CLEO协作组织提供了一个独立的更高统计数据样本。我们的目标是预测Dalitz图振幅和相位假设风味SU（3）对称性，并与实验进行比较。SU（3）拟合可以解释衰变$D^0 \to K^{*-}K^+$和$D^0 \to K^{*+}K^-$振幅的相对大小，但无论是当前的BaBar样本（基于22 fb $^{-1}$的积分亮度）还是CLEO分析都没有关于衰变$D^0\to K^{*0}\ok$和$D^0 \to \oks K^0$的重要证据。在这个层次上，人们无法将幅度和相位与理论预测进行比较。这封信的目的是倡导使用完整的BaBar样本进行分析（超过2002年数值的20倍）。它应该明确地确定预测的震级和相位是否与实验相符。类似的分析应该是可能的，甚至更大的样本收集的事件贝尔合作在KEK-B。

英文摘要：

The processes $D^0\to K^0 K^-π^+$ and $D^0\to\ok K^+π^-$ involve intermediate vector resonances whose amplitudes and phases are related to each other via flavor-SU(3) symmetry. Dalitz plots for these two processes can shed light on the usefulness of this symmetry in studying charm decays. Until this year the only available data on this process came from a conference report in 2002 by the BaBar Collaboration, but now an independent data sample of higher statistics has become available from the CLEO Collaboration. The goal is to predict Dalitz plot amplitudes and phases assuming flavor-SU(3) symmetry and compare them with experiment. An SU(3) fit can account for the relative magnitudes of the amplitudes for the decays $D^0 \to K^{*-}K^+$ and $D^0 \to K^{*+}K^-$, but neither the current BaBar sample (based on an integrated luminosity of 22 fb$^{-1}$) nor the CLEO analysis has significant evidence for the decays $D^0\to K^{*0}\ok$ and $D^0 \to \oks K^0$. At this level one is unable to compare magnitudes and phases with theoretical predictions. The purpose of this Letter is to advocate an analysis using the full BaBar sample (more than 20 times the 2002 value). It should definitively determine whether predicted magnitudes and phases agree with experiment. A similar analysis should be possible with an even larger sample of events collected by the Belle Collaboration at KEK-B.

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