Constraining Muon Internal Bremsstrahlung as a Contribution to the MiniBooNE Low Energy Excess

Details Constraining Muon Internal Bremsstrahlung as a Contribution to the MiniBooNE Low Energy Excess Constraining Muon Internal Bremsstrahlung as a Contribution to the MiniBooNE Low Energy Excess

2007-10-22

arxiv.org/abs/0710.3897v1

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, 3 figures. Response to arXiv:0709.4004 [hep-ex]. Submitted to Phys. Rev. D (Brief Reports)

Scientific paper

Using a cleanly tagged data sample of $\nu_\mu$ charged current events, it is demonstrated that the rate at which such events are mis-identified as $\nu_e$'s is accurately simulated in the MiniBooNE $\nu_\mu \to \nu_e$ analysis. Such mis-identification, which could arise from muon internal bremsstrahlung, is decisively ruled out as a source of the low energy electron-like events reported in the MiniBooNE search for $\nu_\mu \to \nu_e$ oscillations. This refutes the conclusions of a recent paper which postulates that hard bremsstrahlung could form a substantial background to the MiniBooNE $\nu_e$ sample.

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