Abstract
We present the results of a new analysis of the data of the MiniBooNE experiment taking into account the additional background of photons from ∆+/0 decay proposed in ref. [1] and additional contributions due to coherent photon emission, incoherent production of higher mass resonances, and incoherent non-resonant nucleon production. We show that the new background can explain part of the MiniBooNE low-energy excess and the statistical significance of the MiniBooNE indication in favor of short-baseline neutrino oscillation decreases from 5.1σ to 3.6σ. We also consider the implications for short-baseline neutrino oscillations in the 3+1 active-sterile neutrino mixing framework. We show that the new analysis of the MiniBooNE data indicates smaller active-sterile neutrino mixing and may lead us towards a solution of the appearance-disappearance tension in the global fit of short-baseline neutrino oscillation data.
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23 February 2021
An Erratum to this paper has been published: https://doi.org/10.1007/JHEP02(2021)078
09 February 2021
An Erratum to this paper has been published: https://doi.org/10.1007/JHEP02(2021)078
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Giunti, C., Ioannisian, A. & Ranucci, G. A new analysis of the MiniBooNE low-energy excess. J. High Energ. Phys. 2020, 146 (2020). https://doi.org/10.1007/JHEP11(2020)146
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DOI: https://doi.org/10.1007/JHEP11(2020)146