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Tufts University, Medford, Massachusetts 02155, USA.
Illinois Institute of Technology (IIT), Chicago, Illinois 60616, USA.
Phys Rev Lett. 2022 Jun 17;128(24):241801. doi: 10.1103/PhysRevLett.128.241801.
We present a measurement of ν_{e} interactions from the Fermilab Booster Neutrino Beam using the MicroBooNE liquid argon time projection chamber to address the nature of the excess of low energy interactions observed by the MiniBooNE Collaboration. Three independent ν_{e} searches are performed across multiple single electron final states, including an exclusive search for two-body scattering events with a single proton, a semi-inclusive search for pionless events, and a fully inclusive search for events containing all hadronic final states. With differing signal topologies, statistics, backgrounds, reconstruction algorithms, and analysis approaches, the results are found to be either consistent with or modestly lower than the nominal ν_{e} rate expectations from the Booster Neutrino Beam and no excess of ν_{e} events is observed.
我们利用MicroBooNE液态氩时间投影室对费米实验室助推器中微子束的νₑ相互作用进行了测量，以探究MiniBooNE合作组观测到的低能相互作用过量现象的本质。在多个单电子末态上进行了三项独立的νₑ搜索，包括对单质子两体散射事件的排他性搜索、对无π介子事件的半包容性搜索以及对包含所有强子末态事件的完全包容性搜索。由于信号拓扑、统计量、本底、重建算法和分析方法不同，结果被发现与助推器中微子束的标称νₑ速率预期一致或略低，未观测到νₑ事件过量。
