量子关联D^0衰变在phi3测量中的应用
The use of quantum-correlated D^0 decays for phi3 measurement
摘要:
本文报道了用B → DK过程D 0衰变的Dalitz图分析确定CKM角φ 3的方法的Monte-Carlo研究结果。我们的主要目标是找到一个独立于模型的phi 3提取的最佳策略。我们发现,在有限的数据样本情况下,仅用CP标记的D介子衰变分析不能提供完全与模型无关的测量。提出了涉及B->DK和psi(3770)->(K 0 pi+ pi-)_D(K 0 pi+ pi-)_D衰变的分箱分析的程序,其允许达到与未分箱的模型依赖拟合相当的φ 3精度。
英文摘要:
We report the results of the Monte-Carlo study of the method to determine the CKM angle phi3 using Dalitz plot analysis of D0 decay from B->DK process. Our main goal is to find the optimal strategy for a model-independent phi3 extraction. We find that the analysis using decays of CP-tagged D mesons only cannot provide a completely model-independent measurement in the case of limited data sample. The procedure involving binned analysis of B->DK and psi(3770)->(K0 pi+ pi-)_D (K0 pi+ pi-)_D decays is proposed, that allows to reach the phi3 precision comparable to unbinned model-dependent fit.
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