Challenging Lorentz noninvariant neutrino oscillations without neutrino masses

Understand

We show that the combined data from solar, long-baseline and reactor neutrino experiments can exclude the generalized bicycle model of Lorentz noninvariant direction-dependent and/or direction-independent oscillations of massless neutrinos.

• This model has five parameters, which is more than is needed in standard oscillation phenomenology with neutrino masses.
• Solar data alone are sufficient to exclude the pure direction-dependent case.
• The combination of solar and long-baseline data rules out the pure direction-independent case.