  We present a comparison of the numerical prediction on baryon asymmetry of
the Universe in different neutrino mass models. We start with a very brief
review on the main formalism of baryogenesis via leptogenesis through decay of
heavy right-handed Majorana neutrinos, and then calculate the baryon asymmetry
of the universe for known six neutrino mass models viz., three
quasi-degenerate, two inverted and one normal hierarchical models, which are
derived from canonical seesaw formula. The corresponding mass matrices for the
right-handed Majorana neutrino as well as the Dirac neutrino, which are fixed
at the seesaw stage for generating correct light neutrino mass matrices, are
again employed in the calculation of baryogenesis. This procedure removes
possible ambiguity on the choices of Dirac neutrino and right-handed Majorana
mass matrices, and fixes input parameters at the seesaw stage. We find that the
ranges of predictions from both normal hierarchical model and degenerate model
(DegT1A) are almost consistent with the observed baryon asymmetry of the
universe. Combining the present result with other predictions such as light
neutrino masses and mixing angles, and stability under radiative corrections in
MSSM, the normal hierarchical model appears to be the most favourable choice of
nature.
