  A composite Fermion (CF) model of quasi particle has been used to describe a
diquark. Considering baryons in quark-diquark configuration,the masses of the
heavy light baryons like $\Lambda_{c}^{+}$, $\Sigma_{c}^{+}$, $\Xi_{c}^{0}$,
$\Omega_{c}^{0}$ and $\Lambda_{b}^{+}$, $\Sigma_{b}^{+}$, $\Xi_{b}^{0}$,
$\Omega_{b}^{-}$ have been computed using this CF model of the diquark. The
results are found to be in good agreement with the corresponding experimental
findings. It has been suggested that the diquark can be well described in the
framework of CF model in a gauge invariant way.
