Trimaximal mixing
Trimaximal mixing refers to the highly symmetric, maximally CP-violating, fermion mixing configuration, characterised by a unitary matrix having all its elements equal in modulus
as may be written, e.g.:
where and
are the complex cube roots of unity. In the standard PDG convention, trimaximal mixing corresponds to:, and. The Jarlskog -violating parameter takes its extremal value.
Originally proposed as a candidate lepton mixing matrix, and actively studied as such, trimaximal mixing is now definitively ruled-out as a phenomenologically viable lepton mixing scheme by neutrino oscillation experiments, especially the Chooz reactor experiment, in favour of the no longer tenable tribimaximal mixing scheme.
