Abstract
We prove that, in any flavor transition, neutrino oscillation -violating asymmetries in matter have two disentangled components: (i) a -odd -invariant term, non-vanishing iff there are interactions with matter, and (ii) a -odd -invariant term, non-vanishing iff there is genuine violation. As function of the baseline, these two terms are distinct -even and -odd observables to separately test (i) matter effects sensitive to the neutrino hierarchy and (ii) genuine violation in the neutrino sector. For the golden channel, the different energy distributions of the two components provide a signature of their separation. At long baselines, they show oscillations in the low and medium energy regions, with zeros at different positions and peculiar behavior around the zeros. We discover a magic energy at with vanishing -odd component and maximal genuine asymmetry proportional to , with the weak phase. For energies above 1.5 GeV, the sign of the asymmetry discriminates the neutrino hierarchy.
- Received 21 June 2018
- Revised 4 September 2018
DOI:https://doi.org/10.1103/PhysRevLett.121.211802
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society