On the ambiguities in the tri-bimaximal mixing matrix and corresponding charged lepton corrections

Chandan Duarah, N. Nimai Singh

Two negative signs naturally appear in the $U_{\mu 1}$ and $U_{\tau 2}$ elements of the Tri-bimaximal (TBM) matrix for positive values of the mixing angles ${\theta }_{12}$ and ${\theta }_{23}$. Apart fr…