Implications of measured properties of the mixing matrix on mass   matrices
  It is shown how the two experimentally measurable properties of the mixing matrix $V$, the asymmetry Delta(V)=|V_{12}|^2- |V_{21}|^2 of V with respect to the main diagonal and the Jarlskog invariant J(V)=Im(V_{11}V_{12}^*V_{21}^*V_{22}), can be exploited to obtain constraints on possible structures of mass matrices in the quark sector. Specific mass matrices are examined in detail as an illustration. 
Subhash Chaturvedi (1), Virendra Gupta (2), and Gabriel Sanchez-Colon   (2) ((1) University of Hyderabad; Hyderabad, INDIA. ...