离轴角聚焦中微子束中$ν_μ$和$ν_e$事例的首次测量
First Measurement of $ν_μ$ and $ν_e$ Events in an Off-Axis Horn-Focused Neutrino Beam
摘要:
我们报告的第一个观察离轴中微子相互作用的MiniBooNE探测器从NuMI光束线在费米实验室。MiniBooNE探测器位于距离NuMI生产目标745 m处,相对于NuMI射束轴成110 mrad角($6.3^{\circ}$)。对带电电流准弹性$ν_μ$和$ν_e$相互作用的样品进行了分析,发现与预期一致。这提供了一个预期的介子和K介子贡献的中微子通量的直接验证,并验证了NuMI离轴光束的建模。
英文摘要:
We report the first observation of off-axis neutrino interactions in the MiniBooNE detector from the NuMI beamline at Fermilab. The MiniBooNE detector is located 745 m from the NuMI production target, at 110 mrad angle ($6.3^{\circ}$) with respect to the NuMI beam axis. Samples of charged current quasi-elastic $ν_μ$ and $ν_e$ interactions are analyzed and found to be in agreement with expectation. This provides a direct verification of the expected pion and kaon contributions to the neutrino flux and validates the modeling of the NuMI off-axis beam.
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