Beaming neutrino and antineutrinos across the Earth to disentangle neutrino mixing parameters

Understand

A MINOS result seemed to hint a different anti-neutrino mass splitting and mixing angle with respect to the neutrino ones, offering a hint for a CPT violation in lepton sector.

• However more recent MINOS data reduced the neutrino-antineutrino differences leading to a narrow discrepancy almost compatible with no CPT violation, hard to be disentangled.
• Moreover last a few years of OPERA activity on tau appearance is still un-probed (one unique event).
• Both flavor muon-tau mixing, tau appearance and eventual CPT violation disentanglement need more tools to be enhanced.