Charged lepton mass spectrum and supersymmetric yukawaon model

On the basis of the so-called supersymmetric yukawaon model, it is investigated what form of the superpotential W can lead to the observed charged lepton mass spectrum. A simple form of W can speculate reasonable values of K(μ)=(me+mμ+mτ)/(me+mμ+mτ)2 and κ(μ)=memμmτ/(me+mμ+mτ)3 at an energy scale μ=Λ.