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arXiv 1310.7724hep-phhep-ex
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利用玻色对称性和Dalitz图观测D介子直接CP破坏的新方法

A new technique to observe direct CP Violation in D mesons using Bose Symmetry and Dalitz Plot

Dibyakrupa Sahoo, Rahul Sinha, N. G. Deshpande, Sandip Pakvasa

备注：
5 Pages, No figures
发表信息：
Phys. Rev. D 89, 071903 (2014)
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摘要：

利用玻色对称性和Dalitz作图，提出了一种新的灵敏的方法来观察$D$介子的直接CP破坏.我们将该方法应用于诸如$B \to D^0\bar{D}^0 P$的过程，其中$P$是$K$或$π$。通过选择重建$D$介子只通过他们的衰变到CP本征态，我们表明，任何不对称的Dalitz图只能通过直接CP破坏。我们进一步展示了如何可以确定CP破坏参数。由于该方法只涉及玻色对称性，因此该方法适用于任何涉及最终状态的$D^0\bar{D}^0$的多体过程。我们简要地讨论了如何以类似的方式使用$B\to D^* \bar{D}^* P$。

英文摘要：

We present a new and sensitive method to observe direct CP violation in $D$ mesons using Bose symmetry and Dalitz plot. We apply the method to processes such as $B \to D^0\bar{D}^0 P$, where $P$ is either a $K$ or a $π$. By choosing to reconstruct $D$ mesons only through their decays into CP eigenstates, we show that any asymmetry in the Dalitz plot can arise only through direct CP violation. We further show how CP violation parameters can be determined. Since the approach involves only Bose symmetry, the method is applicable to any multi-body process that involves $D^0\bar{D}^0$ in the final state. We briefly discuss how $B\to D^* \bar{D}^* P$ can also be used in a similar way.

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