T2K measurements of muon neutrino and antineutrino disappearance using 3.13×10^21 protons on target
T2K measurements of muon neutrino and antineutrino disappearance using 3.13×10^21 protons on target
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使用 3.13×10^21 质子对目标进行 T2K 测量 μ 中微子和反中微子消失
DOI：
10.1103/physrevd.103.l011101
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Y.Oyama et al.
中科院分区：
文献类型：
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作者：
K.Abe;T.Ishida;Y.Oyama et al.
本文报道了在T2K中微子能量和传播距离下，三味PMNS中微子振荡模型中μ子中微子和反中微子消失的参数的测量结果。利用实验运行的能力，无论是一个主要的中微子或主要的反中微子束，μ介子从每个光束模式的事件被用来测量这些参数分别为中微子和反中微子振荡。采用中微子模式和反中微子模式的靶上质子（POT）数据。用T2K得到的最佳拟合值为：Δ m322 = 2.47 - 0.09 + 0.08（2.50 - 0.13 + 0.18）× 10 - 3eV~2/c_4。描述μ中微子和反中微子消失的参数值之间没有显着差异。使用一个有效的两味中微子振荡模型的混合角的正弦值允许采取大于1的非物理值的分析也进行检查我们的数据与三味模型的一致性。我们的数据被发现是一致的混合角的物理值。
We report measurements by the T2K experiment of the parametersand, which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNS neutrino oscillation model at T2K’s neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. Data taken fromprotons on target (POT) in neutrino mode andPOT in antineutrino mode are used. The best-fit values obtained by T2K wereand Δm322=2.47-0.09+0.08(2.50-0.13+0.18)×10-3 eV2/c4 for neutrinos (antineutrinos). No significant differences between the values of the parameters describing the disappearance of muon neutrinos and antineutrinos were observed. An analysis using an effective two-flavor neutrino oscillation model where the sine of the mixing angle is allowed to take nonphysical values larger than 1 is also performed to check the consistency of our data with the three-flavor model. Our data were found to be consistent with a physical value for the mixing angle.