
We review the status of CPT violation in the neutrino sector. Apart from LSND, current data favors three flavors of light stable neutrinos and antineutrinos, with both halves of the spectrum having one smaller mass splitting and one larger mass splitting. Oscillation data for the smaller splitting is consistent with CPT. For the larger splitting, current data favor an antineutrino masssquared splitting that is an order of magnitude larger than the corresponding neutrino splitting, with the corresponding mixing angle lessthanmaximal. This CPTviolating spectrum is driven by recent results from MINOS, but is consistent with other experiments if we ignore LSND. We describe an analysis technique which, together with MINOS running optimized for muon antineutrinos, should be able to conclusively confirm the CPTviolating spectrum proposed here, with as little as three times the current data set. If confirmed, the CPTviolating neutrino masssquared difference would be an order of magnitude less than the current moststringent upper bound on CPT violation for quarks and charged leptons.
