Speaker
Description
Lorentz Invariance is one of the most important laws of nature. Precision measurements of neutrino oscillation parameters in current and next-generation experiments aim to resolve the octant of $\theta_{23}$, determine the neutrino mass ordering, and measure the CP-violating phase . However, subleading new-physics effects can introduce parameter degeneracies that obscure these determinations. In this work, we investigate the impact of tiny Lorentz Invariance Violation (LIV) on the degeneracy structure of neutrino oscillations, focusing on the complementarity between reactor, atmospheric and long-baseline accelerator experiments.
Using simulated data from Jiangmen Underground Neutrino Observatory (JUNO) and Deep Underground Neutrino Experiment (DUNE), we analyze how LIV-induced modifications to the effective Hamiltonian affect the determination of the mass hierarchy, the octant of $\theta_{23}$ and $\delta_{\rm CP}$. We show how the combination of different sectors of neutrino oscillation make the existing degeneracies in three flavour oscillations fading away.