A Wigner/CS decomposition of the 6x6 seesaw mixing matrix is developed, showing that the light-heavy hierarchy is carried by three tiny rotation angles and all remaining model freedom by four unitary matrices.
History and generality of the CS decompos ition,
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Wigner-like Parametrization of Canonical Seesaw Models
A Wigner/CS decomposition of the 6x6 seesaw mixing matrix is developed, showing that the light-heavy hierarchy is carried by three tiny rotation angles and all remaining model freedom by four unitary matrices.