Interference between the Atmospheric and Solar Oscillation Amplitudes

Abstract

We propose to detect the interference effect between the atmospheric-scale and solar-scale waves of neutrino oscillation, one of the key consequences of the three-generation structure of leptons. In vacuum, we show that there is a natural and general way of decomposing the oscillation amplitude into these two oscillation modes. The nature of the interference is cleanest in the ${\bar{\nu }}_e$ disappearance channel since it is free from the CP-phase $\delta$. We find that the upcoming JUNO experiment offers an ideal setting to observe this interference with more than $4\sigma$ significance, even under conservative assumptions about the systematic uncertainties.

arXiv comment6 pages, 2 figures, expanded discussion on how this relates to mass hierarchy, version accepted for publication in Phys. Rev. D

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• Exploring SMEFT Induced Non-Standard Interactions from COHERENT to Neutrino Oscillations
• Probing Lepton Flavor Models at Future Neutrino Experiments
• Neutrino amplitude decomposition in matter
• Neutrino Oscillations at JUNO, the Born Rule, and Sorkin's Triple Path Interference
• From ray to spray: augmenting amplitudes and taming fast oscillations in fully numerical neutrino codes
• Neutrino amplitude decomposition: Toward observing the atmospheric - solar wave interference