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arXiv · 1912.01524

A new analysis of the MiniBooNE low-energy excess

C. Giunti·A. Ioannisian·G. Ranucci
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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 $\Delta^{+/0}$ decay proposed in arXiv:1909.08571 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 $5.1\sigma$ to $3.6\sigma$. 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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C. Giunti, A. Ioannisian, G. Ranucci. 2019-12-03. A new analysis of the MiniBooNE low-energy excess. https://doi.org/10.1007/jhep11(2020)146

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