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Trimaximal mixing  (also known as threefold maximal mixing ) refers to the highly symmetric, maximally CP-violating, fermion mixing configuration, characterised by a unitary matrix (U) having all its elements equal in modulus (, a,i = 1,2,3) as may be written, e.g.:
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where ω = exp(i2π / 3) and are the complex cube roots of unity. In the standard PDG  convention, trimaximal mixing corresponds to: θ12 = θ23 = π / 4, and δ = π / 2. The Jarlskog CP-violating parameter J  takes its extremal value .
Originally proposed as a candidate lepton mixing matrix  , and actively studied     as such (and even as a candidate quark mixing matrix ), 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 (related) tribimaximal mixing  scheme.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Trimaximal_mixing". A list of authors is available in Wikipedia.|