Model-independent search for CP violation in D 0 ? K - K + p - p + and D 0 ? p - p + p + p - decays
Model-independent search for CP violation in D 0 ? K - K + p - p + and D 0 ? p - p + p + p - decays
复制标题
独立于模型搜索 D 0 中的 CP 违规？
DOI：
10.1016/j.physletb.2013.09.011
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发表时间：
2013
影响因子：
4.4
通讯作者：
Aaij R
中科院分区：
文献类型：
--
作者：
Aaij R
给出了在D0和D0bar衰变到最终态K-K+pi +和pi-pi+pi+pi-的相空间结构中寻找CP违背的方法。此次搜索使用的数据集对应于2011年在质心能量为7TeV的大型强子对撞机实验中收集的1.0fb^-1的综合光度。对于K-K+pi-pi+终态，四体相空间分为32个仓，每个仓大约有1800个衰变。无CP违逆假设下的p值为9.1%，没有箱体中CP不对称性大于6.5%。pi-pi+pi+pi-终态的相空间被划分为128个仓，每个仓大约有2500个衰减。无CP违和假设下的值为41%，没有箱体中观察到CP不对称大于5.5%。所有结果都符合当前灵敏度下无CP违逆的假设。
A search for CP violation in the phase-space structures of D0 and D0bar decays to the final states K-K+pi-pi+ and pi-pi+pi+pi- is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0fb^-1 collected in 2011 by the LHCb experiment incollisions at a centre-of-mass energy of 7TeV. For the K-K+pi-pi+ final state, the four-body phase space is divided into 32 bins, each bin with approximately 1800 decays. The p-value under the hypothesis of no CP violation is 9.1%, and in no bin is a CP asymmetry greater than 6.5% observed. The phase space of the pi-pi+pi+pi- final state is partitioned into 128 bins, each bin with approximately 2500 decays. The-value under the hypothesis of no CP violation is 41%, and in no bin is a CP asymmetry greater than 5.5% observed. All results are consistent with the hypothesis of no CP violation at the current sensitivity.