First muon-neutrino disappearance study with an off-axis beam
First muon-neutrino disappearance study with an off-axis beam
复制标题
首次利用离轴光束研究μ子中微子消失
DOI：
10.1103/physrevd.85.031103
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发表时间：
2011
影响因子：
5
通讯作者：
et al.(T2K Collaboration)
中科院分区：
文献类型：
--
作者：
K.Abe;et al.(T2K Collaboration)
我们报告了在T2K实验中对μ -中微子消失的测量。从东海到神冈的295公里的介子-中微子束是在长基线中微子振荡实验中首次实现离轴技术。通过与目标上的质子相对应的数据，我们在超级神冈观测到31个完全包含的单环事件，与没有中微子振荡的事件的预期相比。双风味振荡的最佳拟合点是sin (2θ23)=0.98和。90%置信区域的边界包括点（sin (2θ23),|Δm322|）=(1.0,3.1×10-3 eV2),（0.84,）和（1.0,）。
We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km muon-neutrino beam from Tokai to Kamioka is the first implementation of the off-axis technique in a long-baseline neutrino oscillation experiment. With data corresponding toprotons on target, we observe 31 fully-contained single-like ring events in Super-Kamiokande, compared with an expectation ofevents without neutrino oscillations. The best-fit point for two-flavoroscillations is sin2(2θ23)=0.98 and. The boundary of the 90% confidence region includes the points (sin2(2θ23),|Δm322|)=(1.0,3.1×10-3 eV2), (0.84,) and (1.0,).