Allowing electron-tau non-standard neutrino interactions in the T2K and NOvA data removes the preference for normal mass ordering and even creates a mild preference for inverted ordering.
Implications of lepton flavour violation on long baseline neutrino oscillation experiments
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abstract
Non-standard neutrino interactions (NSIs), the sub-leading effects in the flavour transitions of neutrinos, play a crucial role in the determination of the various unknowns in neutrino oscillations, such as neutrino mass hierarchy, Dirac CP violating phase and the octant of atmospheric mixing angle. In this work, we focus on the possible implications of lepton flavour violating (LFV) NSIs, which generally affect the neutrino propagation, on the determination of the these unknown oscillation parameters. We study the effect of these NSIs on the physics potential of the currently running and upcoming long-baseline experiments, i.e., T2K, NO$\nu$A and DUNE. We also check the allowed oscillation parameter space in presence of LFV NSIs.
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Neutrino mass ordering obscured by non-standard interactions
Allowing electron-tau non-standard neutrino interactions in the T2K and NOvA data removes the preference for normal mass ordering and even creates a mild preference for inverted ordering.