  There is no evidence that the universe must have been homogeneous and
isotropic before the big bang nucleosynthesis. The Bianchi type-I cosmology is
the simplest homogeneous but anisotropic cosmology. In this work, we
investigate thermal leptogenesis, as a baryogenesis scenario, in the Bianchi
type-I cosmology. Our results show that for specific values of the anisotropy,
the modified thermal leptogenesis generated more baryon asymmetry than the
standard one. In this way, anisotropy can help to achieve low-scale
leptogenesis.
