Abstract
We point out that for solar neutrino oscillations with the mass-squared difference of , i.e., in the so-called vacuum oscillation range, the solar matter effects are non-negligible, particularly for the low energy neutrinos. One consequence of this is that the values of the mixing angle and are not equivalent, making it necessary to consider the entire physical range of the mixing angle when determining the allowed values of the neutrino oscillation parameters.
- Received 1 February 2000
DOI:https://doi.org/10.1103/PhysRevLett.85.936
©2000 American Physical Society