Invariance of Jarlskog Determinant Above the GUT Scale

An asymmetry between the probabilities P(ν _μ →ν _e ) and (P(bar {nu _{mu }}rightarrow bar {nu _{e}})) would be direct indication of CP violation at the fundamental level. Planck scale effects on neutrino mixing, we have derived the mixing angles of neutrino flavour due to Planck scale effects. It has been shown that Jarlskog determinant remains nearly invariant above the GUT scale.