Limits on neutrino oscillations from the CHOOZ experiment
Limits on neutrino oscillations from the CHOOZ experiment
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DOI：
10.1016/s0370-2693(99)01072-2
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发表时间：
1999-07
影响因子：
4.4
通讯作者：
M. Apollonio;A. Baldini;C. Bemporad;E. Caffau;F. Cei;Y. Déclais;H. Kerret;B. Dieterle;A. Etenko
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文献类型：
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作者：
M. Apollonio;A. Baldini;C. Bemporad;E. Caffau;F. Cei;Y. Déclais;H. Kerret;B. Dieterle;A. Etenko
我们基于整个Chooz(Chooz实验以法国阿登地区Chooz村附近的法国电力公司(EDF)运营的新核电站命名)数据样本提供了新的结果。我们发现(在90%的置信度下)在ν̄e消失模式下没有中微子振荡的证据，对于最大混合的近似δm~2>；7·10−4eV~2给出的参数区域，以及对于大的θm~2，Sin 22δ=0.10。还给出了仅基于两个不同距离核反应堆正电子能谱的比较的较低灵敏度结果；这些结果与ν̄电子通量的绝对归一化、截面、靶质子数和探测器效率无关。
We present new results based on the entire CHOOZ (The CHOOZ experiment is named after the new nuclear power station operated by Électricité de France (EdF) near the village of Chooz in the Ardennes region of France) data sample. We find (at 90% confidence level) no evidence for neutrino oscillations in the ν ̄edisappearance mode, for the parameter region given by approximately δm2>7·10−4eV2for maximum mixing, and sin22θ=0.10 for large δm2. Lower sensitivity results, based only on the comparison of the positron spectra from the two different-distance nuclear reactors, are also presented; these are independent of the absolute normalization of the ν ̄eflux, the cross section, the number of target protons and the detector efficiencies.