Neutrino Shortcuts in Spacetime

Understand

Theories with large extra dimensions may be tested using sterile neutrinos living in the bulk.

• A bulk neutrino can mix with a flavor neutrino localized in the brane leading to unconventional patterns of neutrino oscillations.
• A resonance phenomenon, strong mixing between the flavor and the sterile neutrino, allows to determine the radius of the large extra dimension.
• If our brane is curved, then the sterile neutrino can take a shortcut through the bulk, leading to an apparent superluminal neutrino speed.