Neutrino oscillation effects in Soudan 2 upward-stopping muons
Neutrino oscillation effects in Soudan 2 upward-stopping muons
复制标题
Soudan 2 向上停止 μ 子中的中微子振荡效应
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
E. al.
中科院分区：
文献类型：
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作者：
Soudan 2 Collaboration;W. Allison;E. al.
由Soudan 2探测器下方岩石中的大气{nu}{sub {mu}}和{nu}{sub {mu}}相互作用引发的上行停止μ子已经被分离出来，以及在探测器内产生的中微子诱导的单μ子的伴随样品，它们向下传播并退出。向下的样品与大气中微子通量预测一致，但向上的样品表现出相当大的损耗。这两个结果都与以前报道的Soudan 2中微子振荡结果一致。包括两个样本的所有事件的可能性分析，使用最近的三维大气中微子通量计算，减少了允许的振荡参数区域和概率的无振荡假设。
Upward-going stopping muons initiated by atmospheric {nu}{sub {mu}} and {nu}{sub {mu}} interactions in the rock below the Soudan 2 detector have been isolated, together with a companion sample of neutrino-induced single muons, created within the detector, which travel downwards and exit. The downward-going sample is consistent with the atmospheric-neutrino flux prediction, but the upward-going sample exhibits a sizable depletion. Both are consistent with previously reported Soudan 2 neutrino-oscillation results. Inclusion of the two samples in an all-event likelihood analysis, using recent 3D-atmospheric-neutrino-flux calculations, reduces both the allowed oscillation parameter region and the probability of the no-oscillation hypothesis.