Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6 × 10 21 protons on target
Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6 × 10 21 protons on target
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使用目标上的 3.6 × 10 21 质子更新了 μ 中微子和反中微子消失的 T2K 测量
DOI：
10.1103/physrevd.108.072011
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发表时间：
2023
影响因子：
5
通讯作者：
Abe K
中科院分区：
文献类型：
--
作者：
Abe K
在标准的三味中微子振荡框架中，μ子中微子和反中微子的消失概率是相同的，但是CPT破坏和非标准相互作用可以破坏这种对称性。本文报道了中微子和反中微子sin ~ 2 θ ~（23）和Δ m ~（232）的独立测量结果。上述对称性破坏将表现为中微子和反中微子振荡参数的不一致。这里讨论的分析分别使用中微子和反中微子束在靶上总共使用了1.97×1021和1.63×1021个质子，并且受益于改进的通量和截面模型，新的近探测器样品和两倍以上的数据，降低了结果的总体不确定性。没有观察到明显的偏差，与标准中微子振荡图像一致
Muon neutrino and antineutrino disappearance probabilities are identical in the standard three-flavor neutrino oscillation framework, but CPT violation and nonstandard interactions can violate this symmetry. In this work we report the measurements of sin2θ23 and Δm232 independently for neutrinos and antineutrinos. The aforementioned symmetry violation would manifest as an inconsistency in the neutrino and antineutrino oscillation parameters. The analysis discussed here uses a total of 1.97×1021 and 1.63×1021 protons on target taken with a neutrino and antineutrino beam respectively, and benefits from improved flux and cross section models, new near-detector samples and more than double the data reducing the overall uncertainty of the result. No significant deviation is observed, consistent with the standard neutrino oscillation picture