Speaker
Julia Gehrlein
Description
In neutrino oscillation physics numerous exact degeneracies exist under the name LMA-Dark.
These degeneracies make it impossible to determine the sign of $\Delta m^2_{31}$ known as the atmospheric mass ordering with oscillation experiments alone in the presence of new neutrino interactions.
We discuss the status of these degeneracies and show that recent data has lifted the LMA-Dark degeneracy in the $\nu_e$ sector, however it can still be restored in the $\nu_\mu$ and $\nu_\tau$ sector or with very specific couplings to up and down quarks, and we speculate on a path forward.
Author
Co-author
Peter Denton
(Brookhaven National Laboratory)
