Measurement of the neutrino mass splitting and flavor mixing by MINOS.
Measurement of the neutrino mass splitting and flavor mixing by MINOS.
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DOI：
10.1103/physrevlett.106.181801
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发表时间：
2011-03
影响因子：
8.6
通讯作者：
P. Adamson;C. Andreopoulos;R. Armstrong;D. Auty;D. Ayres;C. Backhouse;G. Barr;M. Bishai;A. B
中科院分区：
文献类型：
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作者：
P. Adamson;C. Andreopoulos;R. Armstrong;D. Auty;D. Ayres;C. Backhouse;G. Barr;M. Bishai;A. B
利用两个MINOS探测器观测到的费米实验室NuMI中微子束中μ子中微子的消失来测量中微子振荡。新的分析方法已应用于从7.25×10（20）质子暴露在目标上的扩大数据样本。对中微子振荡的拟合得到大气质量分裂的|Δm(2)|=(2.32（-0.08)(+0.12)）×10(-3) eV(2)和混合角的sin(2)(2θ)>0.90 （90% c.l）。纯中微子衰变和量子退相干假设分别在7和9个标准差处被排除。
Measurements of neutrino oscillations using the disappearance of muon neutrinos from the Fermilab NuMI neutrino beam as observed by the two MINOS detectors are reported. New analysis methods have been applied to an enlarged data sample from an exposure of 7.25×10(20) protons on target. A fit to neutrino oscillations yields values of |Δm(2)|=(2.32(-0.08)(+0.12))×10(-3) eV(2) for the atmospheric mass splitting and sin(2)(2θ)>0.90 (90% C.L.) for the mixing angle. Pure neutrino decay and quantum decoherence hypotheses are excluded at 7 and 9 standard deviations, respectively.