Icecube/DeepCore tests for novel explanations of the MiniBooNE anomaly

Abstract

While the low-energy excess observed at MiniBooNE remains unchallenged, it has become increasingly difficult to reconcile it with the results from other sterile neutrino searches and cosmology. Recently, it has been shown that non-minimal models with new particles in a hidden sector could provide a better fit to the data. As their main ingredients they require a GeV-scale $Z^{\prime }$, kinetically mixed with the photon, and an unstable heavy neutrino with a mass in the 150 MeV range that mixes with the light neutrinos. In this letter we point out that atmospheric neutrino experiments (and, in particular, IceCube/DeepCore) could probe a significant fraction of the parameter space of such models by looking for an excess of "double-bang" events at low energies, as proposed in our previous work (arXiv:1707.08573). Such a search would probe exactly the same production and decay mechanisms required to explain the anomaly.

6 pages, 1 figure. v3: minor changes, references added, version accepted for publication in EPJC

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• Explaining the MiniBooNE Excess Through a Mixed Model of Oscillation and Decay
• Two-Higgs doublet solution to the LSND, MiniBooNE and muon $g-2$ anomalies
• New constraints on Heavy Neutral Leptons from Super-Kamiokande data
• Searches for Atmospheric Long-Lived Particles
• Probing New Physics at Future Tau Neutrino Telescopes
• Model Independent Bounds on the Non-Oscillatory Explanations of the MiniBooNE Excess
• LeptonInjector and LeptonWeighter: A neutrino event generator and weighter for neutrino observatories
• Requirements on common solutions to the LSND and MiniBooNE excesses: a post-MicroBooNE study
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• Double Bangs at IceCube as a Window to the Neutrino Mass Origin