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DOI：
10.1007/s100520050429
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
V. Lisovskyi;Xabier Cid Vidal
中科院分区：
文献类型：
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作者：
V. Lisovskyi;Xabier Cid Vidal
利用1991- 1995年ALEPH实验收集的半轻子b-强子衰变样品，对振荡进行了研究。与以往的全轻子分析相比，本方法的时间分辨和b味错误率都有明显的改善。通过识别具有高于整个数据样本的平均值的纯度的事件的子样本来获得额外的灵敏度混合。进行未分组的最大似然振幅拟合，以得出95%置信限（95%CL）下的下限。结合基于ALEPH的分析，得出95% CL。
A search foroscillations is performed using a sample of semileptonic b-hadron decays collected by the ALEPH experiment during 1991–95. Compared to previous inclusive lepton analyses, the proper time resolution and b-flavour mistag rate are significantly improved. Additional sensitivity tomixing is obtained by identifying subsamples of events having apurity which is higher than the average for the whole data sample. Unbinned maximum likelihood amplitude fits are performed to derive a lower limit ofat the 95% confidence limit (95% CL). Combining with the ALEPH-based analyses yieldsat 95% CL.