MicroBooNE and the νe Interpretation of the MiniBooNE Low-Energy Excess

A new generation of neutrino experiments is testing the 4.7a anomalous excess of electronlike events observed in MiniBooNE. This is of huge importance for particle physics, astrophysics, and cosmology, not only because of the potential discovery of physics beyond the standard model, but also because the lessons we will learn about neutrino-nucleus interactions will be crucial for the worldwide neutrino program. MicroBooNE has recently released results that appear to disfavor several explanations of the MiniBooNE anomaly. Here, we show quantitatively that MicroBooNE results, while a promising start, unquestionably do not probe the full parameter space of sterile neutrino models hinted at by MiniBooNE and other data, nor do they probe the ve interpretation of the MiniBooNE excess in a model-independent way.

Automated summary

A new generation of neutrino experiments is testing the anomalous excess of electronlike events observed in MiniBooNE. This is of huge importance for particle physics, astrophysics, and cosmology. The recent results from MicroBooNE are promising, but they do not fully explore the parameter space of sterile neutrino models hinted at by MiniBooNE and other data, nor do they probe the MiniBooNE excess in a model-independent way.