标题： CP破坏与多重体$D$衰变中的混合 显示英文标题

标题： CP Violation and Mixing in Multi-body $D$ decays

摘要： 我们介绍最近LHCb在多体D介子衰变中CP破坏和混合测量方面的结果及未来前景。 多体衰变的复振幅结构为局部位于某些相空间区域的CP破坏提供了独特的敏感性。 在D→π+π-π+π-和D→K+K-π+π-衰变的相空间中进行的模型无关搜索，未发现局部CP破坏的证据。 如果假设没有CP破坏，得到观察结果的概率分别为9.1%和41%。 从B→DK中确定γ需要外部输入以考虑D0和D0bar振幅对同一末态的干涉。 以前这种输入只能在D介子阈值处获得，但最近提出D混合可以提供补充信息。 对于D→K+π-π+π-衰变的例子，表明可以利用D混合显著改善现有数据对相干因子和平均强相位差的约束。 显示英文摘要

摘要： We present recent LHCb results and future prospects for CP violation and mixing measurements in multi-body charm decays. The complex amplitude structure of multi-body decays provides unique sensitivity to CP violation localised in certain phase space regions. A model-independent search in the phase space of D->pi+pi-pi+pi- and D->K+K-pi+pi- decays showed no evidence for localised CP violation. If one assumes the no CP violation hypothesis, the probability of getting the observed results is 9.1% and 41%, respectively. The model-independent determination of gamma from B->DK requires external input to account for the interference of D0 and D0bar amplitudes to the same final state. Previously this input could only be obtained at the charm threshold, but recently it has been proposed that D mixing can provide complimentary information. For the example of D->K+pi-pi+pi- decays, it is shown that charm mixing can be used to considerably improve current constraints on the coherence factor and average strong phase difference, with existing data.